Weather tomorrow: Issaquah

Forecast for tomorrow, 29 September: cloudy and light rain. The daily air temperature range is 11 to 13 °C. Chance of precipitation tomorrow according to the daily forecast: 90%. Forecast precipitation amount: 5.1 mm. Wind from the south at 4.2 m/s.

tuesday 29 september

Cloudy and light rain

Cloudy and light rain, Precipitation probability 90%, Sunrise 07:05, Sunset 18:51, 29.09.2026

+13°

+11°

Sunset 18:51

G/m activity 2

Precipitation probability 90%

Precipitation 5.1 mm

Wind 4.2 m/s

Pressure 1009.3 hPa

Index UV 0

Humidity 92%

Sunrise 07:05

Moon Waning Gibbous

Sunrise 07:05

Sunset 18:51

G/m activity 2

Moon Waning Gibbous

Overcast
night
+11°
Overcast and showers
morning
+12°
Cloudy and light rain
day
+13°
Fog
evening
+13°
Time
Description
Temperature
Precipitation probability
Precipitation
Wind

00:00

Overcast

11°

29 %
-

S

2.8 m/s

01:00

Overcast

12°

26 %
-

S

2.5 m/s

02:00

Overcast

12°

26 %
-

S

2.8 m/s

03:00

Overcast

12°

26 %
-

S

2.5 m/s

04:00

Overcast

12°

25 %
-

S

2.2 m/s

05:00

Overcast

12°

23 %
-

S

2.5 m/s

06:00

Overcast and showers

12°

26 %
-

S

2.2 m/s

07:00

Overcast

12°

27 %
-

S

2.5 m/s

08:00

Overcast and showers

11°

36 %
0.1 mm

S

2.5 m/s

09:00

Overcast and showers

12°

36 %
0.1 mm

S

2.5 m/s

10:00

Overcast and showers

12°

30 %
-

S

3.3 m/s

11:00

Overcast and showers

13°

38 %
0.1 mm

S

3.6 m/s

12:00

Cloudy and light rain

13°

59 %
0.3 mm

S

3.6 m/s

13:00

Cloudy and light rain

13°

70 %
0.5 mm

S

3.3 m/s

14:00

Cloudy and light rain

13°

74 %
0.7 mm

S

3.3 m/s

15:00

Cloudy and light rain

13°

75 %
0.7 mm

SW

3.1 m/s

16:00

Overcast and light rain

13°

72 %
0.8 mm

SW

3.1 m/s

17:00

Cloudy and light rain

13°

74 %
0.7 mm

SW

2.8 m/s

18:00

Fog

13°

46 %
0.1 mm

SW

2.5 m/s

19:00

Fog

13°

51 %
0.1 mm

SW

2.2 m/s

20:00

Cloudy and light rain

12°

58 %
0.2 mm

SW

1.4 m/s

21:00

Cloudy and light rain

12°

68 %
0.4 mm

SW

1.1 m/s

22:00

Overcast and light rain

12°

62 %
0.4 mm

W

1.1 m/s

23:00

Overcast and light rain

11°

61 %
0.4 mm

N

1.4 m/s

What is the atmospheric pressure in Issaquah tomorrow?

Pressure adjusted for location elevation. Location elevation: 33 m relative to sea level

Forecast for 29.09.2026 · Local time

Pressure: 1006.6–1013.3 hPa.

Minimum: 1006.6 hPa14:00

Maximum: 1013.3 hPa23:00

Largest change over 3 hours: +2.7 hPa · 17:00–20:00
First of 3 intervals with the same change magnitude shown.

hPa · Change over the previous 3 hours

1010.6 00:00 —
1010.6 01:00 —
1010.6 02:00 —
1010.6 03:00 0
1009.3 04:00 −1.3
1009.3 05:00 −1.3
1009.3 06:00 −1.3
1007.9 07:00 −1.3
1007.9 08:00 −1.3
1007.9 09:00 −1.3
1007.9 10:00 0
1007.9 11:00 0
1007.9 12:00 0
1007.9 13:00 0
1006.6 14:00 −1.3
1007.9 15:00 0
1007.9 16:00 0
1007.9 17:00 +1.3
1009.3 18:00 +1.3
1009.3 19:00 +1.3
1010.6 20:00 +2.7
1010.6 21:00 +1.3
1011.9 22:00 +2.7
1013.3 23:00 +2.7

Colours show pressure relative to this day’s range

Lower · 1006.6 Scale midpoint · 1009.9 Higher · 1013.3 Largest change over 3 hours

What is the chance of precipitation in Issaquah tomorrow?

Chance of precipitation tomorrow according to the daily forecast: 90%.

Precipitation for tomorrow

Hourly precipitation forecast
00:00 Amount of precipitation in millimeters (mm): 0 mm Probability of precipitation in percent (%): 29%
01:00 Amount of precipitation in millimeters (mm): 0 mm Probability of precipitation in percent (%): 26%
02:00 Amount of precipitation in millimeters (mm): 0 mm Probability of precipitation in percent (%): 26%
03:00 Amount of precipitation in millimeters (mm): 0 mm Probability of precipitation in percent (%): 26%
04:00 Amount of precipitation in millimeters (mm): 0 mm Probability of precipitation in percent (%): 25%
05:00 Amount of precipitation in millimeters (mm): 0 mm Probability of precipitation in percent (%): 23%
06:00 Amount of precipitation in millimeters (mm): 0 mm Probability of precipitation in percent (%): 26%
07:00 Amount of precipitation in millimeters (mm): 0 mm Probability of precipitation in percent (%): 27%
08:00 Amount of precipitation in millimeters (mm): 0.1 mm Probability of precipitation in percent (%): 36%
09:00 Amount of precipitation in millimeters (mm): 0.1 mm Probability of precipitation in percent (%): 36%
10:00 Amount of precipitation in millimeters (mm): 0 mm Probability of precipitation in percent (%): 30%
11:00 Amount of precipitation in millimeters (mm): 0.1 mm Probability of precipitation in percent (%): 38%
12:00 Amount of precipitation in millimeters (mm): 0.3 mm Probability of precipitation in percent (%): 59%
13:00 Amount of precipitation in millimeters (mm): 0.5 mm Probability of precipitation in percent (%): 70%
14:00 Amount of precipitation in millimeters (mm): 0.7 mm Probability of precipitation in percent (%): 74%
15:00 Amount of precipitation in millimeters (mm): 0.7 mm Probability of precipitation in percent (%): 75%
16:00 Amount of precipitation in millimeters (mm): 0.8 mm Probability of precipitation in percent (%): 72%
17:00 Amount of precipitation in millimeters (mm): 0.7 mm Probability of precipitation in percent (%): 74%
18:00 Amount of precipitation in millimeters (mm): 0.1 mm Probability of precipitation in percent (%): 46%
19:00 Amount of precipitation in millimeters (mm): 0.1 mm Probability of precipitation in percent (%): 51%
20:00 Amount of precipitation in millimeters (mm): 0.2 mm Probability of precipitation in percent (%): 58%
21:00 Amount of precipitation in millimeters (mm): 0.4 mm Probability of precipitation in percent (%): 68%
22:00 Amount of precipitation in millimeters (mm): 0.4 mm Probability of precipitation in percent (%): 62%
23:00 Amount of precipitation in millimeters (mm): 0.4 mm Probability of precipitation in percent (%): 61%

Issaquah weather tomorrow: morning, afternoon and evening

Morning: overcast and showers, +12 °C. Afternoon: cloudy and light rain, +13 °C. Evening: fog, +13 °C.

According to the hourly forecast, tomorrow's highest temperature is expected from 11:00 to 19:00, at around +13 °C. Times are local.

Tomorrow's strongest winds are expected from 11:00 to 12:00 (from the south). The lightest winds are expected at 21:00 (from the southwest); at 22:00 (from the west). Times are local.

Temperature and wind for tomorrow

+11° +12° +12° +12° +13° +13° +13° +12° 2.8 m/s 2.5 m/s 2.2 m/s 2.5 m/s 3.6 m/s 3.1 m/s 2.5 m/s 1.1 m/s
00:00 03:00 06:00 09:00 12:00 15:00 18:00 21:00
- Wind direction and speed, m/s
- Temperature, °C

What geomagnetic activity is forecast for Issaquah tomorrow?

The highest forecast Kp index for tomorrow is 2.

Magnetic storm tomorrow

00:00 2
03:00 1
06:00 1
09:00 1
12:00 2
15:00 2
18:00 2
21:00 2

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