Seattle (WA)
August
Weather in Seattle, Washington for August 2025
Your guide to Seattle weather in August - trends and predictions
The forecast for the first days of August 2025 in Seattle predicts a temperature of 25.2 °F, which is slightly above the historical average.
In general, the average temperature in Seattle at the beginning of August is 24.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 25 °F by the end of August.
The climate of Seattle in August is notably wet, with an average of 14 rainy days, and a total of 32.7 mm of precipitation.
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Temperatures
Rain 🌧️
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17
Dry days
14
Rainy days
0
Snow days
26°/14°
Temperatures
12 km/h
Avg max wind
64 %
Avg humidity
Seattle Weather August
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Temperatures trend during August in Seattle
See the weather trend as well as the moving average line
August weather in Seattle day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Overcast | 17° /16° | 0 mm | 2 | |
| Aug. 2 |  Moderate rain | 29° /15° | 15.6 mm | 2.1 | |
| Aug. 3 |  Sunny | 24° /10° | 0 mm | 0 | |
| Aug. 4 |  Partly cloudy | 22° /12° | 0 mm | 5 | |
| Aug. 5 | Overcast | 21° /12° | 0 mm | 4 | |
| Aug. 6 |  Patchy rain possible | 27° /16° | 0 mm | 4 | |
| Aug. 7 | Sunny | 29° /13° | 0 mm | 5 | |
| Aug. 8 | Patchy rain possible | 21° /15° | 0.1 mm | 4 | |
| Aug. 9 | Overcast | 16° /11° | 0.1 mm | 3 | |
| Aug. 10 | Partly cloudy | 26° /13° | 0 mm | 5 | |
| Aug. 11 | Sunny | 28° /14° | 0 mm | 6 | |
| Aug. 12 | Sunny | 33° /17° | 0 mm | 6 | |
| Aug. 13 |  Cloudy | 29° /15° | 0.2 mm | 7 | |
| Aug. 14 | Partly cloudy | 30° /15° | 0 mm | 8 | |
| Aug. 15 | Sunny | 30° /15° | 0 mm | 7 | |
| Aug. 16 | Sunny | 27° /14° | 0.6 mm | 6 | |
| Aug. 17 | Overcast | 28° /14° | 1 mm | 7 | |
| Aug. 18 | Sunny | 28° /14° | 1.4 mm | 7 | |
| Aug. 19 | Sunny | 27° /13° | 0.2 mm | 7 | |
| Aug. 20 | Patchy rain possible | 24° /13° | 1.4 mm | 6 | |
| Aug. 21 | Sunny | 25° /13° | 0.1 mm | 6 | |
| Aug. 22 |  Moderate rain at times | 24° /13° | 1.7 mm | 6 | |
| Aug. 23 | Partly cloudy | 23° /12° | 1 mm | 6 | |
| Aug. 24 | Overcast | 24° /12° | 5.1 mm | 6 | |
| Aug. 25 | Sunny | 28° /13° | 0.2 mm | 7 | |
| Aug. 26 | Sunny | 26° /12° | 1.7 mm | 6 | |
| Aug. 27 | Patchy rain possible | 23° /12° | 2.7 mm | 6 | |
| Aug. 28 | Partly cloudy | 24° /11° | 0.2 mm | 6 | |
| Aug. 29 | Sunny | 24° /11° | 2.8 mm | 6 | |
| Aug. 30 | Sunny | 25° /12° | 0.4 mm | 6 | |
| Aug. 31 | Sunny | 25° /12° | 1.5 mm | 6 | |
| Next | |||||
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.
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Seattle in August - FAQ
What are the expected maximum and minimum temperatures in Seattle during August?
Enjoy moderate daytime temperatures of up to 26° 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 32.7 mm across approximately 14 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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