King County (Seattle)
August
Weather in King County for August 2025
Your guide to King County weather in August - trends and predictions
In general, the average temperature in King County 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 King County 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
King County 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 King County
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 King County 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 King County forecast closer to your planned date for the most up-to-date weather information.
King County in August - FAQ
What are the expected maximum and minimum temperatures in King County 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 King County during August?
In August, King County 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 King County during August?
The average wind speed in King County during August is 12 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in King County
Explore the daily rainfall trends and prepare for King Countys August weather 💧
UV exposure in King County during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Where is King County?Get accurate weather forecasts for King County, located at latitude 47.606 and longitude -122.332. Stay updated with localized weather information tailored for King County.
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