Seattle
August
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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20
Dry days
11
Rainy days
0
Snow days
27°/14°
Temperatures
12 km/h
Avg max wind
65 %
Avg humidity
Seattle in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  29° | 2  31° | 3  30° | ||||
| 4  31° | 5  29° | 6  27° | 7 26° | 8 28° | 9 26° | 10 27° |
| 11 26° | 12 25° | 13 26° | 14 29° | 15 30° | 16 28° | 17 29° |
| 18 25° | 19 25° | 20 24° | 21 24° | 22 22° | 23 20° | 24 20° |
| 25 26° | 26 28° | 27 25° | 28 24° | 29 20° | 30 24° | 31 23° |
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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 | 29° /12° | 0 mm | 6 | |
| Aug. 2 | Partly cloudy | 31° /14° | 0 mm | 7 | |
| Aug. 3 | Sunny | 30° /14° | 0 mm | 8 | |
| Aug. 4 | Overcast | 31° /14° | 0 mm | 7 | |
| Aug. 5 | Patchy rain possible | 29° /14° | 0.7 mm | 7 | |
| Aug. 6 | Moderate rain at times | 27° /14° | 0.6 mm | 6 | |
| Aug. 7 | Moderate rain at times | 26° /14° | 1.1 mm | 6 | |
| Aug. 8 | Overcast | 28° /14° | 0 mm | 7 | |
| Aug. 9 | Patchy rain possible | 26° /15° | 1.6 mm | 7 | |
| Aug. 10 | Patchy rain possible | 27° /13° | 1.8 mm | 7 | |
| Aug. 11 | Cloudy | 26° /13° | 0 mm | 6 | |
| Aug. 12 | Cloudy | 25° /12° | 0 mm | 6 | |
| Aug. 13 | Sunny | 26° /13° | 0 mm | 7 | |
| Aug. 14 | Sunny | 29° /14° | 0 mm | 8 | |
| Aug. 15 | Sunny | 30° /14° | 0 mm | 7 | |
| Aug. 16 | Sunny | 28° /15° | 0 mm | 7 | |
| Aug. 17 | Partly cloudy | 29° /14° | 1.4 mm | 7 | |
| Aug. 18 | Overcast | 25° /14° | 2.7 mm | 6 | |
| Aug. 19 | Sunny | 25° /11° | 0 mm | 7 | |
| Aug. 20 | Sunny | 24° /12° | 2.6 mm | 6 | |
| Aug. 21 | Sunny | 24° /12° | 0.1 mm | 6 | |
| Aug. 22 | Overcast | 22° /11° | 0.4 mm | 5 | |
| Aug. 23 | Patchy rain possible | 20° /12° | 2 mm | 5 | |
| Aug. 24 | Cloudy | 20° /11° | 10.3 mm | 5 | |
| Aug. 25 | Patchy rain possible | 26° /13° | 0.4 mm | 6 | |
| Aug. 26 | Sunny | 28° /11° | 0.6 mm | 8 | |
| Aug. 27 | Sunny | 25° /11° | 3.1 mm | 6 | |
| Aug. 28 | Patchy rain possible | 24° /11° | 0.3 mm | 6 | |
| Aug. 29 | Light rain shower | 20° /11° | 5.5 mm | 5 | |
| Aug. 30 | Overcast | 24° /12° | 0.6 mm | 6 | |
| Aug. 31 | 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.
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