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Weather in Seattle for August 2025

Your guide to Seattle weather in August - trends and predictions
  • In general, the average temperature in Seattle at the beginning of August is 29 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.3 °F by the end of August.

  • The climate of Seattle in August is notably wet, with an average of 11 rainy days.

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Average dry days
20
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
27°/14°
Temperatures
Average wind speed
12 km/h
Avg max wind
Average humidity
65 %
Avg humidity

Seattle in August average weather

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Temperatures trend during August in Seattle

See the weather trend as well as the moving average line

August weather day by day

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Date Weather Temperatures Rain UV More
Aug. 1 Cloudy
Cloudy
29° /12° 0 mm 6
Aug. 2 Partly cloudy
Partly cloudy
31° /14° 0 mm 7
Aug. 3 Sunny
Sunny
30° /14° 0 mm 8
Aug. 4 Overcast
Overcast
31° /14° 0 mm 7
Aug. 5 Patchy rain possible
Patchy rain possible
29° /14° 0.7 mm 7
Aug. 6 Moderate rain at times
Moderate rain at times
27° /14° 0.6 mm 6
Aug. 7 Moderate rain at times
Moderate rain at times
26° /14° 1.1 mm 6
Aug. 8 Overcast
Overcast
28° /14° 0 mm 7
Aug. 9 Patchy rain possible
Patchy rain possible
26° /15° 1.6 mm 7
Aug. 10 Patchy rain possible
Patchy rain possible
27° /13° 1.8 mm 7
Aug. 11 Cloudy
Cloudy
26° /13° 0 mm 6
Aug. 12 Cloudy
Cloudy
25° /12° 0 mm 6
Aug. 13 Sunny
Sunny
26° /13° 0 mm 7
Aug. 14 Sunny
Sunny
29° /14° 0 mm 8
Aug. 15 Sunny
Sunny
30° /14° 0 mm 7
Aug. 16 Sunny
Sunny
28° /15° 0 mm 7
Aug. 17 Partly cloudy
Partly cloudy
29° /14° 1.4 mm 7
Aug. 18 Overcast
Overcast
25° /14° 2.7 mm 6
Aug. 19 Sunny
Sunny
25° /11° 0 mm 7
Aug. 20 Sunny
Sunny
24° /12° 2.6 mm 6
Aug. 21 Sunny
Sunny
24° /12° 0.1 mm 6
Aug. 22 Overcast
Overcast
22° /11° 0.4 mm 5
Aug. 23 Patchy rain possible
Patchy rain possible
20° /12° 2 mm 5
Aug. 24 Cloudy
Cloudy
20° /11° 10.3 mm 5
Aug. 25 Patchy rain possible
Patchy rain possible
26° /13° 0.4 mm 6
Aug. 26 Sunny
Sunny
28° /11° 0.6 mm 8
Aug. 27 Sunny
Sunny
25° /11° 3.1 mm 6
Aug. 28 Patchy rain possible
Patchy rain possible
24° /11° 0.3 mm 6
Aug. 29 Light rain shower
Light rain shower
20° /11° 5.5 mm 5
Aug. 30 Overcast
Overcast
24° /12° 0.6 mm 6
Aug. 31 Light rain shower
Light rain shower
23° /12° 2.5 mm 6
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Important Notice
Our weather forecast for Seattle in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Seattle forecast closer to your planned date for the most up-to-date weather information.

Seattle in August - FAQ

What are the expected maximum and minimum temperatures in Seattle during August?
Enjoy moderate daytime temperatures of up to 27° and cooler nights around 14°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Seattle during August?
In August, Seattle can expect light to moderate rainfall, totaling 32.6 mm across approximately 11 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Seattle during August?
The average wind speed in Seattle during August is 12 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Seattle

Explore the daily rainfall trends and prepare for Seattles August weather 💧

UV exposure in Seattle during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

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Location coordinates Where is Seattle?

Get accurate weather forecasts for Seattle, located at latitude 47.606 and longitude -122.332. Stay updated with localized weather information tailored for Seattle.

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