{"id":254552,"date":"2026-08-16T19:21:49","date_gmt":"2026-08-16T16:21:49","guid":{"rendered":"https:\/\/pogodnik.com\/?p=254552"},"modified":"2026-08-16T19:25:09","modified_gmt":"2026-08-16T16:25:09","slug":"usa-canada-weather-17-26-august-2026","status":"publish","type":"post","link":"https:\/\/pogodnik.com\/en\/news\/usa-canada-weather-17-26-august-2026","title":{"rendered":"USA &#038; Canada Weather: 43\u00b0C Texas Heat, Storms and a Late-August Warm-Up"},"content":{"rendered":"<style><span data-mce-type=\"bookmark\" style=\"display: inline-block; width: 0px; overflow: hidden; line-height: 0;\" class=\"mce_SELRES_start\">\ufeff<\/span><br \/>.pogodnik-us-canada-17-26-aug-2026{<br \/>  --bg:#ffffff;<br \/>  --surface:#f8fafc;<br \/>  --surface2:#f3f6fa;<br \/>  --bluebg:#eef8ff;<br \/>  --greenbg:#edf9f2;<br \/>  --redbg:#fff1f0;<br \/>  --yellowbg:#fff8e7;<br \/>  --text:#172033;<br \/>  --muted:#586579;<br \/>  --border:#d7e0eb;<br \/>  --link:#155f9d;<br \/>  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--green:#43b883;<br \/>  --red:#ff7b72;<br \/>  --yellow:#e6b85c<br \/>}<br \/>@media(max-width:620px){<br \/>  .pogodnik-us-canada-17-26-aug-2026{padding:0 10px!important;font-size:17px!important}<br \/>  .pogodnik-us-canada-17-26-aug-2026 h1{font-size:clamp(28px,9vw,38px)!important}<br \/>  .pogodnik-us-canada-17-26-aug-2026 h2{font-size:clamp(24px,7vw,31px)!important}<br \/>  .pogodnik-us-canada-17-26-aug-2026 h3{font-size:clamp(20px,6vw,25px)!important}<br \/>  .pogodnik-us-canada-17-26-aug-2026 .summary-box,.pogodnik-us-canada-17-26-aug-2026 .city-section,.pogodnik-us-canada-17-26-aug-2026 .country-divider,.pogodnik-us-canada-17-26-aug-2026 .app-box,.pogodnik-us-canada-17-26-aug-2026 .faq-box{padding:18px!important}<br \/>  .pogodnik-us-canada-17-26-aug-2026 .app-button{display:block!important;width:100%!important;text-align:center!important}<br \/>}<br \/><\/style>\n<article class=\"pogodnik-us-canada-17-26-aug-2026\" lang=\"en-US\">\n<h1>USA &amp; Canada Weather: 43\u00b0C Texas Heat, Storms and a Late-August Warm-Up<\/h1>\n<p class=\"lead\">The next ten days will divide the United States and Canada into several very different weather zones.<\/p>\n<div class=\"summary-box\">\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-253265\" src=\"https:\/\/pogodnik.com\/cdn-cgi\/image\/quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2026\/04\/us-weather-scaled.webp\" alt=\"usa weather forecast\" width=\"2560\" height=\"1433\" srcset=\"https:\/\/pogodnik.com\/cdn-cgi\/image\/quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2026\/04\/us-weather-scaled.webp 2560w, https:\/\/pogodnik.com\/cdn-cgi\/image\/width=300,height=168,fit=crop,quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2026\/04\/us-weather.webp 300w, https:\/\/pogodnik.com\/cdn-cgi\/image\/width=600,height=336,fit=crop,quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2026\/04\/us-weather.webp 600w, https:\/\/pogodnik.com\/cdn-cgi\/image\/width=768,height=430,fit=crop,quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2026\/04\/us-weather.webp 768w, https:\/\/pogodnik.com\/cdn-cgi\/image\/width=1536,height=860,fit=crop,quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2026\/04\/us-weather.webp 1536w, https:\/\/pogodnik.com\/cdn-cgi\/image\/width=2048,height=1146,fit=crop,quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2026\/04\/us-weather.webp 2048w, https:\/\/pogodnik.com\/cdn-cgi\/image\/width=150,height=84,fit=crop,quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2026\/04\/us-weather.webp 150w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><\/p>\n<h2>USA &amp; Canada weather 17\u201326 August: key points<\/h2>\n<ul>\n<li><strong>Dallas:<\/strong> the standout heat hotspot, with repeated 40\u201343\u00b0C days and very warm nights near 28\u201331\u00b0C.<\/li>\n<li><strong>Atlanta:<\/strong> extreme heat near 38\u00b0C early, followed by thunderstorms and partial relief.<\/li>\n<li><strong>Denver and Los Angeles:<\/strong> heat builds later in the period, reaching roughly 37\u201338\u00b0C.<\/li>\n<li><strong>New York and Chicago:<\/strong> large temperature swings, rain episodes and another warm-up near 24\u201326 August.<\/li>\n<li><strong>Canada:<\/strong> generally milder, with cooler nights and occasional rain; Calgary has the strongest late-period rain\/wind signal.<\/li>\n<li><strong>Forecast uncertainty:<\/strong> days 8\u201310 should be treated as a trend, especially for rainfall timing and exact maxima.<\/li>\n<\/ul>\n<\/div>\n<p>The strongest and most persistent heat will remain across the southern and south-central United States. <strong>Dallas stands out as the major heat hotspot, with temperatures repeatedly above 40\u00b0C and potentially approaching 43\u00b0C.<\/strong> Atlanta also begins the period under intense heat, while Denver and Los Angeles become increasingly hot later in the forecast.<\/p>\n<p>The Pacific Northwest will be almost the opposite. Seattle and Vancouver remain mostly dry and comfortable, with daytime temperatures generally in the 20s. Across eastern Canada, Toronto, Montreal and Ottawa will experience a much milder pattern, with several cooler intervals and only short-lived warmer spells.<\/p>\n<p>The eastern United States will be more changeable. New York City gets a warm start, rain, a cooler weekend and then another rebound toward 30\u00b0C. Miami stays hot and humid throughout, but rainfall becomes increasingly important during the second half of the period.<\/p>\n<p>So the main ten-day story is clear:<\/p>\n<p><strong>extreme heat in Texas and parts of the southern U.S., increasing heat in the West and Rockies, milder conditions across much of Canada, and several sharp temperature swings around the Great Lakes and Northeast.<\/strong><\/p>\n<p>Let\u2019s look at the forecast city by city.<\/p>\n<div class=\"city-section\">\n<h2>New York City: Warm Start, Rain, Cooler Weekend, Then Heat Returns<\/h2>\n<p>New York City starts the period with unsettled weather.<\/p>\n<p>Monday, August 17, reaches around <strong>27\u201328\u00b0C<\/strong>, but Open-Meteo indicates approximately <strong>15 mm of rain<\/strong>, making this one of the wettest days of the ten-day forecast for the city.<\/p>\n<p>The weather then turns hotter.<\/p>\n<p>Tuesday reaches close to <strong>30\u00b0C<\/strong>, followed by around <strong>31\u00b0C on Wednesday, August 19<\/strong>.<\/p>\n<p>Wednesday currently looks like the warmest day of the first half of the forecast, with a very mild nighttime temperature close to <strong>24\u00b0C<\/strong>.<\/p>\n<p>But that warmth does not last.<\/p>\n<p>By Saturday and Sunday, August 22\u201323, highs drop to only around <strong>23\u00b0C<\/strong>. Some rain also returns, with approximately <strong>4\u20137 mm<\/strong> possible during the weekend.<\/p>\n<p>And then comes another reversal.<\/p>\n<p>Monday, August 24, rebounds to around <strong>29\u00b0C<\/strong>, while Wednesday, August 26, may reach approximately <strong>31\u00b0C again<\/strong>.<\/p>\n<p>Rain could also return on August 26, with around <strong>7\u20138 mm<\/strong> currently indicated.<\/p>\n<p>So New York gets a classic late-summer temperature roller coaster:<\/p>\n<p><strong>rain \u2192 31\u00b0C heat \u2192 23\u00b0C cool spell \u2192 another return toward 30\u00b0C.<\/strong><\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Miami, Florida: Hot, Humid and Increasingly Wet<\/h2>\n<p>Miami remains firmly locked in tropical summer weather throughout the period.<\/p>\n<p>Daytime temperatures stay between approximately <strong>30 and 34\u00b0C<\/strong>, with the highest readings during the first few days.<\/p>\n<p>Tuesday, August 18, may reach around <strong>34\u00b0C<\/strong>.<\/p>\n<p>But daytime heat is only part of the story.<\/p>\n<p>Nighttime temperatures become extremely warm, frequently remaining around <strong>29\u00b0C<\/strong> during the second half of the forecast.<\/p>\n<p>That means very little overnight relief from the heat and humidity.<\/p>\n<p>The first several days are relatively dry, but rainfall chances increase from around August 21 onward.<\/p>\n<p>The more notable rainfall signals currently include:<\/p>\n<ul>\n<li>around <strong>8 mm on August 23<\/strong><\/li>\n<li>approximately <strong>11 mm on August 25<\/strong><\/li>\n<li>around <strong>7 mm on August 26<\/strong><\/li>\n<\/ul>\n<p>This does not necessarily mean all-day rain. In Miami, these totals may come from tropical showers and thunderstorms concentrated into relatively short periods.<\/p>\n<p>The main concern therefore remains the combination of:<\/p>\n<p><strong>heat + humidity + very warm nights + increasing thunderstorm potential.<\/strong><\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Atlanta, Georgia: Extreme Heat First, Stormier and Cooler Later<\/h2>\n<p>Atlanta begins the ten-day period under some of the strongest heat in the eastern United States.<\/p>\n<p>Monday reaches approximately <strong>37\u00b0C<\/strong>.<\/p>\n<p>Tuesday, Wednesday and Thursday may all reach around <strong>38\u00b0C<\/strong>.<\/p>\n<p>The current Open-Meteo peak is approximately <strong>38.1\u00b0C<\/strong>.<\/p>\n<p>Nighttime temperatures also remain extremely high, with lows around <strong>25\u201327\u00b0C<\/strong>.<\/p>\n<p>This creates significant cumulative heat stress because the city receives very little overnight cooling.<\/p>\n<p>But there is an important change around August 21.<\/p>\n<p>Temperatures fall from around <strong>38\u00b0C Thursday to approximately 33\u00b0C Friday<\/strong>, while rainfall increases.<\/p>\n<p>Current rainfall totals are roughly:<\/p>\n<ul>\n<li><strong>5\u20136 mm Friday<\/strong><\/li>\n<li>around <strong>3 mm Saturday<\/strong><\/li>\n<li>another <strong>3 mm Sunday<\/strong><\/li>\n<\/ul>\n<p>Sunday may be the coolest day of the ten-day period, at around <strong>31\u00b0C<\/strong>.<\/p>\n<p>After that, the heat begins rebuilding.<\/p>\n<p>By August 25\u201326, temperatures return toward approximately <strong>35\u201336\u00b0C<\/strong>.<\/p>\n<p>So Atlanta\u2019s ten-day pattern can be summarized as:<\/p>\n<p><strong>extreme heat \u2192 thunderstorms and partial relief \u2192 another late-period warm-up.<\/strong><\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Chicago, Illinois: Cool Start, Midweek Rain and a Strong Warm-Up at the End<\/h2>\n<p>Chicago will be one of the more variable major U.S. cities.<\/p>\n<p>Monday starts surprisingly cool at only around <strong>23\u00b0C<\/strong>.<\/p>\n<p>Tuesday warms rapidly to approximately <strong>29\u00b0C<\/strong>.<\/p>\n<p>Wednesday then turns wetter, with around <strong>6 mm of rain<\/strong> currently forecast and a maximum near <strong>25\u00b0C<\/strong>.<\/p>\n<p>Most of the middle of the forecast remains comfortable, generally between <strong>23 and 28\u00b0C<\/strong>.<\/p>\n<p>The coolest day could be Monday, August 24, at only around <strong>22\u00b0C<\/strong>.<\/p>\n<p>But look at what happens next.<\/p>\n<p>Tuesday jumps to nearly <strong>30\u00b0C<\/strong>, and Wednesday, August 26, could reach around <strong>31\u00b0C<\/strong>.<\/p>\n<p>Winds also become stronger late in the forecast, with gusts potentially exceeding <strong>50 km\/h on August 26<\/strong>.<\/p>\n<p>So Chicago ends the ten-day period very differently from how it begins.<\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Dallas, Texas: The Most Dangerous Heat Hotspot<\/h2>\n<p>Dallas is the standout extreme-heat location in this forecast.<\/p>\n<p>This is not simply a few hot afternoons.<\/p>\n<p>Open-Meteo currently shows a <strong>persistent sequence near or above 40\u00b0C<\/strong>.<\/p>\n<p>Monday, August 17:<\/p>\n<p><strong>around 41\u00b0C<\/strong><\/p>\n<p>Tuesday:<\/p>\n<p><strong>approximately 43\u00b0C<\/strong><\/p>\n<p>Wednesday:<\/p>\n<p><strong>around 42\u00b0C<\/strong><\/p>\n<p>Thursday:<\/p>\n<p><strong>around 42\u00b0C<\/strong><\/p>\n<p>The current forecast peak is approximately:<\/p>\n<p><strong>42.9\u00b0C on August 18.<\/strong><\/p>\n<p>Even after a slight reduction Friday, temperatures remain around <strong>39\u00b0C<\/strong>.<\/p>\n<p>Then the heat intensifies again:<\/p>\n<p>Saturday around <strong>42\u00b0C<\/strong><\/p>\n<p>Sunday around <strong>42\u00b0C<\/strong><\/p>\n<p>Monday around <strong>41\u00b0C<\/strong><\/p>\n<p>and temperatures remain close to <strong>40\u00b0C through August 26<\/strong>.<\/p>\n<p>There is another major problem \u2014 nighttime heat.<\/p>\n<p>Minimum temperatures frequently stay around <strong>28\u201331\u00b0C<\/strong>.<\/p>\n<p>That means homes, buildings, roads and the human body receive almost no meaningful overnight cooling.<\/p>\n<p>And there is currently <strong>virtually no rainfall signal for the entire ten-day period<\/strong>.<\/p>\n<p>Dallas therefore has the highest heat-health concern among the cities in this forecast.<\/p>\n<p>The combination is dangerous:<\/p>\n<p><strong>40\u201343\u00b0C afternoons + near-30\u00b0C nights + dry conditions lasting many days.<\/strong><\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Denver, Colorado: Strong Heat Builds Over the Rockies<\/h2>\n<p>Denver also faces significant heat.<\/p>\n<p>Monday already reaches approximately <strong>34\u00b0C<\/strong>.<\/p>\n<p>Tuesday rises to around <strong>35\u00b0C<\/strong>.<\/p>\n<p>Most of the period remains above 32\u00b0C.<\/p>\n<p>The hottest part arrives later.<\/p>\n<p>Saturday, August 22, could reach around <strong>37.5\u00b0C<\/strong>.<\/p>\n<p>Monday, August 24, may again approach <strong>37\u00b0C<\/strong>.<\/p>\n<p>That is significant heat for Denver\u2019s elevation.<\/p>\n<p>Rainfall remains limited overall. Only small daily totals appear in the model, generally below 2 mm.<\/p>\n<p>This means the dominant weather story is not thunderstorms but <strong>persistent hot and mostly dry conditions<\/strong>.<\/p>\n<p>Nights also become progressively warmer, rising from around <strong>15\u00b0C early in the period to 22\u201324\u00b0C later<\/strong>.<\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Los Angeles, California: A Significant Heat Build-Up<\/h2>\n<p>Los Angeles starts warm but becomes significantly hotter during the second half of the forecast.<\/p>\n<p>Monday reaches approximately <strong>31\u00b0C<\/strong>.<\/p>\n<p>Tuesday and Wednesday rise into the <strong>34\u201335\u00b0C range<\/strong>.<\/p>\n<p>Thursday approaches <strong>36\u00b0C<\/strong>.<\/p>\n<p>After remaining near 34\u201335\u00b0C for another couple of days, another pulse of heat arrives.<\/p>\n<p>Sunday and Monday, August 23\u201324, both reach approximately <strong>37\u00b0C<\/strong> in the current Open-Meteo run.<\/p>\n<p>The nighttime trend is particularly striking.<\/p>\n<p>Minimum temperatures rise from around <strong>18\u00b0C Monday to 25\u201328\u00b0C later in the period<\/strong>.<\/p>\n<p>Monday, August 24, could remain near <strong>28\u00b0C overnight<\/strong> in the model grid point.<\/p>\n<p>The entire ten-day period is essentially dry.<\/p>\n<p>This creates a growing heat and fire-weather concern, particularly away from the immediate coast and in hotter inland parts of the Los Angeles metropolitan area.<\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Seattle, Washington: Warm, Dry and Remarkably Stable<\/h2>\n<p>Seattle will be one of the calmest locations in this forecast.<\/p>\n<p>There is currently <strong>no measurable rain forecast for the entire ten-day period<\/strong>.<\/p>\n<p>Monday reaches around <strong>26\u00b0C<\/strong>.<\/p>\n<p>Tuesday and Wednesday approach <strong>29\u00b0C<\/strong>.<\/p>\n<p>Friday may become the warmest day, at around <strong>29\u201330\u00b0C<\/strong>.<\/p>\n<p>Temperatures cool temporarily during the weekend to around <strong>25\u00b0C<\/strong>, before climbing back toward <strong>29\u00b0C Monday and Tuesday<\/strong>.<\/p>\n<p>Nights remain comfortable, generally around <strong>13\u201316\u00b0C<\/strong>.<\/p>\n<p>Compared with the extreme heat affecting Texas, Georgia and parts of the Southwest, Seattle\u2019s weather will feel almost ideal:<\/p>\n<p><strong>warm afternoons, cool nights and very little weather disruption.<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-57853\" src=\"https:\/\/pogodnik.com\/cdn-cgi\/image\/quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2022\/07\/Canada.jpg\" alt=\"\" width=\"1280\" height=\"720\" srcset=\"https:\/\/pogodnik.com\/cdn-cgi\/image\/quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2022\/07\/Canada.jpg 1280w, https:\/\/pogodnik.com\/cdn-cgi\/image\/width=300,height=169,fit=crop,quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2022\/07\/Canada.jpg 300w, https:\/\/pogodnik.com\/cdn-cgi\/image\/width=600,height=338,fit=crop,quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2022\/07\/Canada.jpg 600w, https:\/\/pogodnik.com\/cdn-cgi\/image\/width=768,height=432,fit=crop,quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2022\/07\/Canada.jpg 768w, https:\/\/pogodnik.com\/cdn-cgi\/image\/width=150,height=84,fit=crop,quality=80,format=auto,onerror=redirect,metadata=none\/wp-content\/uploads\/2022\/07\/Canada.jpg 150w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Toronto: Mild, Mostly Dry and No Major Heatwave<\/h2>\n<p>Toronto experiences a much gentler pattern than many U.S. cities.<\/p>\n<p>Monday and Tuesday both reach approximately <strong>26\u00b0C<\/strong>.<\/p>\n<p>Wednesday stays similar, near 26\u00b0C, with a small chance of rain.<\/p>\n<p>Thursday falls to around <strong>24\u00b0C<\/strong>, followed by the coolest day on Friday at only about <strong>22\u00b0C<\/strong>.<\/p>\n<p>Temperatures rebound during the weekend.<\/p>\n<p>Saturday reaches approximately <strong>26\u00b0C<\/strong> and Sunday around <strong>27\u00b0C<\/strong>, currently the warmest day of the ten-day period.<\/p>\n<p>Monday then cools back toward <strong>23\u00b0C<\/strong>.<\/p>\n<p>Most of the period is dry.<\/p>\n<p>The main rain signal comes at the very end of the forecast, when approximately <strong>10 mm<\/strong> may fall on August 26.<\/p>\n<p>Overall, Toronto avoids both extreme heat and prolonged rain.<\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Montreal: Coolest of the Major Eastern Cities<\/h2>\n<p>Montreal remains noticeably cooler than Toronto and New York.<\/p>\n<p>Monday reaches only around <strong>21\u00b0C<\/strong>, accompanied by approximately <strong>7 mm of rain<\/strong>.<\/p>\n<p>Tuesday improves to around <strong>24\u00b0C<\/strong>.<\/p>\n<p>The rest of the week generally stays between approximately <strong>21 and 26\u00b0C<\/strong>.<\/p>\n<p>The warmest day may be Saturday, August 22, near <strong>26\u00b0C<\/strong>.<\/p>\n<p>Another wetter period appears around Sunday, August 23, with approximately <strong>6 mm of rain<\/strong>.<\/p>\n<p>Night temperatures become quite fresh.<\/p>\n<p>Friday morning may fall to around <strong>13\u00b0C<\/strong>, with other nights in the <strong>13\u201317\u00b0C range<\/strong>.<\/p>\n<p>Montreal therefore gets a very typical late-summer pattern:<\/p>\n<p><strong>mild days, cool nights and occasional frontal rain.<\/strong><\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Ottawa: Comfortable Days and Cool Nights<\/h2>\n<p>Ottawa also avoids major heat.<\/p>\n<p>Monday reaches around <strong>24\u00b0C<\/strong>.<\/p>\n<p>Tuesday rises to approximately <strong>26\u00b0C<\/strong>.<\/p>\n<p>Thursday cools to around <strong>22\u00b0C<\/strong>.<\/p>\n<p>Saturday provides another warmer interval near <strong>27\u00b0C<\/strong>, which is currently the highest forecast temperature.<\/p>\n<p>But the nighttime temperatures tell an interesting story.<\/p>\n<p>Friday morning could fall to approximately <strong>10\u00b0C<\/strong>.<\/p>\n<p>Several other nights remain around <strong>11\u201314\u00b0C<\/strong>.<\/p>\n<p>Rainfall is generally light and scattered.<\/p>\n<p>The largest current signal is around <strong>4 mm on August 26<\/strong>.<\/p>\n<p>So Ottawa\u2019s period is best described as <strong>comfortable late-summer weather with some distinctly cool mornings<\/strong>.<\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Calgary: Warm Spells, Sharp Swings and a Wet Sunday<\/h2>\n<p>Calgary will be considerably more variable.<\/p>\n<p>Monday starts around <strong>24\u00b0C<\/strong>.<\/p>\n<p>Tuesday warms toward <strong>28\u00b0C<\/strong>, and Wednesday reaches approximately <strong>29\u00b0C<\/strong>.<\/p>\n<p>Thursday then drops back toward <strong>23\u00b0C<\/strong>.<\/p>\n<p>But another stronger warm-up follows.<\/p>\n<p>Friday reaches around <strong>28\u00b0C<\/strong>.<\/p>\n<p>Saturday climbs to approximately <strong>31\u00b0C<\/strong>.<\/p>\n<p>Then comes the most interesting weather change.<\/p>\n<p>Sunday, August 23, falls to around <strong>27\u00b0C<\/strong>, with approximately <strong>12 mm of rain<\/strong> and wind gusts potentially above <strong>50 km\/h<\/strong>.<\/p>\n<p>That currently makes August 23 one of the more notable Canadian weather days in this outlook.<\/p>\n<p>Temperatures recover again later, potentially returning to around <strong>31\u00b0C on August 26<\/strong>.<\/p>\n<\/div>\n<div class=\"city-section\">\n<h2>Vancouver: Mild Pacific Weather With Very Little Rain<\/h2>\n<p>Vancouver remains mild throughout the period.<\/p>\n<p>Monday reaches around <strong>25\u00b0C<\/strong>.<\/p>\n<p>Tuesday drops to approximately <strong>22\u00b0C<\/strong>.<\/p>\n<p>Wednesday only reaches around <strong>21\u00b0C<\/strong>.<\/p>\n<p>A warmer period returns Thursday near <strong>24\u00b0C<\/strong>, followed by temperatures in the low 20s.<\/p>\n<p>Saturday may be the coolest day, near <strong>19\u00b0C<\/strong>, before the city warms again to approximately <strong>26\u00b0C on August 24<\/strong>.<\/p>\n<p>Rainfall remains extremely limited.<\/p>\n<p>Only a small amount is currently indicated around August 21\u201322.<\/p>\n<p>For late August, this is a remarkably calm Pacific pattern.<\/p>\n<p># USA &amp; Canada 10-Day Weather Trend: What Matters Most?<\/p>\n<p>The most important feature of the August 17\u201326 forecast is the enormous temperature contrast across North America.<\/p>\n<p>At one extreme:<\/p>\n<p><strong>Dallas may reach 42\u201343\u00b0C.<\/strong><\/p>\n<p>At the other:<\/p>\n<p>Montreal, Vancouver and parts of the Great Lakes region periodically struggle to reach even <strong>20\u201323\u00b0C<\/strong>.<\/p>\n<p>That means the continental temperature difference between major cities may exceed <strong>20\u00b0C<\/strong> on some days.<\/p>\n<h3>Hottest locations<\/h3>\n<p><strong>Dallas:<\/strong> up to <strong>42.9\u00b0C<\/strong><\/p>\n<p><strong>Atlanta:<\/strong> up to <strong>38.1\u00b0C<\/strong><\/p>\n<p><strong>Denver:<\/strong> up to <strong>37.5\u00b0C<\/strong><\/p>\n<p><strong>Los Angeles:<\/strong> up to <strong>36.8\u00b0C<\/strong><\/p>\n<p><strong>Miami:<\/strong> around <strong>34\u00b0C<\/strong>, but with much higher humidity<\/p>\n<h3>Most persistent heat<\/h3>\n<p>Dallas is clearly number one.<\/p>\n<p>The model currently keeps the city close to or above <strong>40\u00b0C during almost the entire ten-day period<\/strong>, with virtually no rainfall and extremely warm nights.<\/p>\n<p>Los Angeles and Denver also show persistent heating, especially from August 20 onward.<\/p>\n<h3>Wetter locations<\/h3>\n<p>The heaviest individual rainfall signals among the selected cities currently include:<\/p>\n<p><strong>New York City:<\/strong> around <strong>15 mm on August 17<\/strong><\/p>\n<p><strong>Calgary:<\/strong> around <strong>12 mm on August 23<\/strong><\/p>\n<p><strong>Miami:<\/strong> around <strong>11 mm on August 25<\/strong><\/p>\n<p><strong>Toronto:<\/strong> around <strong>10 mm on August 26<\/strong><\/p>\n<p><strong>Montreal:<\/strong> around <strong>7 mm on August 17<\/strong><\/p>\n<p>Rainfall forecasts beyond about a week have substantially greater uncertainty, so the exact totals for August 24\u201326 should be treated as a trend rather than a precise prediction.<\/p>\n<h3>Coolest pattern<\/h3>\n<p>Canada remains mostly comfortable.<\/p>\n<p>Montreal and Ottawa frequently stay in the low-to-mid 20s, while Vancouver remains around <strong>19\u201325\u00b0C<\/strong>.<\/p>\n<p>Chicago also experiences a surprisingly cool period around August 23\u201324 before warming sharply again.<\/p>\n<h3>Main forecast message<\/h3>\n<p>The southern United States stays locked beneath intense late-summer heat, while much of Canada remains comparatively mild.<\/p>\n<p>The most serious weather concern is <strong>prolonged extreme heat in Texas<\/strong>, followed by significant heat in Atlanta, Denver and Los Angeles.<\/p>\n<p>Meanwhile, frontal systems bring periodic rain and large temperature changes across the Northeast, Great Lakes and eastern Canada.<\/p>\n<p>And there is one more thing to watch.<\/p>\n<p><strong>By August 24\u201326, several cities begin another significant warm-up \u2014 including New York, Chicago, Denver and Calgary.<\/strong> Whether this develops into a broader late-August heat expansion across North America will become much clearer in the next forecast update.<\/p>\n<p><strong>Forecast period:<\/strong> August 17\u201326, 2026<br \/>\n<strong>Data source:<\/strong> Open-Meteo Forecast API<br \/>\n<strong>Cities analyzed:<\/strong> New York City, Miami, Chicago, Dallas, Los Angeles, Denver, Atlanta, Seattle, Toronto, Montreal, Ottawa, Calgary and Vancouver.<\/p>\n<p><em>Forecast confidence is highest during the first 5\u20137 days. Details near days 8\u201310, especially rainfall timing and exact maximum temperatures, can still change.<\/em><\/p>\n<\/div>\n<div class=\"app-box\">\n<h2>Track North America weather with Weather Forecaster<\/h2>\n<p><strong>Weather Forecaster<\/strong> provides hourly and long-range forecasts, temperature, rain, wind and severe-weather information for cities across the United States, Canada and worldwide.<\/p>\n<p><a class=\"app-button\" href=\"https:\/\/pogodnik.com\/en\/en-weather-app\" target=\"_blank\" rel=\"noopener\"><strong>Open Weather Forecaster<\/strong><\/a><\/p>\n<\/div>\n<div class=\"faq-box\">\n<h2>USA &amp; Canada weather FAQ: 17\u201326 August 2026<\/h2>\n<details>\n<summary>Where will the most dangerous heat be?<\/summary>\n<p>Dallas is the standout heat hotspot, with the forecast showing repeated 40\u201343\u00b0C afternoons and nighttime temperatures often near 28\u201331\u00b0C.<\/p>\n<\/details>\n<details>\n<summary>Which U.S. cities warm up again late in the forecast?<\/summary>\n<p>New York, Chicago, Denver and Calgary all show another meaningful warm-up around August 24\u201326.<\/p>\n<\/details>\n<details>\n<summary>Where are the largest rainfall signals?<\/summary>\n<p>The supplied forecast highlights about 15 mm in New York on August 17, around 12 mm in Calgary on August 23, around 11 mm in Miami on August 25 and around 10 mm in Toronto on August 26.<\/p>\n<\/details>\n<details>\n<summary>Which Canadian cities stay coolest?<\/summary>\n<p>Montreal, Ottawa and Vancouver generally remain in the low-to-mid 20s for much of the period, with several notably cool nights.<\/p>\n<\/details>\n<details>\n<summary>How reliable are days 8\u201310?<\/summary>\n<p>Confidence is lower near August 24\u201326, especially for rainfall timing and exact maximum temperatures. Those later values should be treated more as a trend than as a precise day-by-day prediction.<\/p>\n<p><strong><a href=\"https:\/\/pogodnik.com\/en\/news\/super-el-nino-2026-2027-forecast\">Super El Nino Forecast<\/a><\/strong><\/p>\n<\/details>\n<\/div>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>USA &#038; Canada weather 17\u201326 August 2026: Dallas near 43\u00b0C, heat builds in Atlanta, Denver and Los Angeles, while Canada stays milder with rain and sharp swings.<\/p>\n","protected":false},"author":1,"featured_media":253265,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[10,6649],"class_list":["post-254552","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-nature-disasters","tag-heat","tag-rainfall","tag-storm-en","tag-thunderstorms","tag-weather-forecast"],"acf":[],"wpml_data":{"original_post_id":254552,"trid":"4893768","lang":"en","source_lang":null},"_links":{"self":[{"href":"https:\/\/pogodnik.com\/en\/wp-json\/wp\/v2\/posts\/254552","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pogodnik.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pogodnik.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pogodnik.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/pogodnik.com\/en\/wp-json\/wp\/v2\/comments?post=254552"}],"version-history":[{"count":"3","href":"https:\/\/pogodnik.com\/en\/wp-json\/wp\/v2\/posts\/254552\/revisions"}],"predecessor-version":[{"id":254557,"href":"https:\/\/pogodnik.com\/en\/wp-json\/wp\/v2\/posts\/254552\/revisions\/254557"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pogodnik.com\/en\/wp-json\/wp\/v2\/media\/253265"}],"wp:attachment":[{"href":"https:\/\/pogodnik.com\/en\/wp-json\/wp\/v2\/media?parent=254552"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pogodnik.com\/en\/wp-json\/wp\/v2\/categories?post=254552"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}