King County (Seattle)
August
Weather in King County, Washington for August 2026
Your guide to King County weather in August - trends and predictions
Until now, August 2026 in King County is slightly cooler than the historical average by 1.4 °F.
The forecast for the next days in King County predicts temperatures to be around 27 °F, close to the historical average.
In general, the average temperature in King County at the beginning of August is 26.3 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 25.4 °F by the end of August.
King County experiences moderate rainfall in August, with an average of 7 rainy days and a total precipitation of 36.9 mm.
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Temperatures
Rain 🌧️
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24
Dry days
7
Rainy days
0
Snow days
26°/14°
Temperatures
12 km/h
Avg max wind
65 %
Avg humidity
King County Weather August
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Temperatures trend during August in King County
See the weather trend as well as the moving average line
August weather in King County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Moderate rain at times | 27° /15° | 0.5 mm | 7 | |
| Aug. 2 |  Partly cloudy | 28° /14° | 0.1 mm | 7 | |
| Aug. 3 |  Sunny | 26° /14° | 0 mm | 7 | |
| Aug. 4 | Sunny | 26° /14° | 1 mm | 7 | |
| Aug. 5 | Sunny | 27° /14° | 0.3 mm | 7 | |
| Aug. 6 | Moderate rain at times | 25° /15° | 2.4 mm | 6 | |
| Aug. 7 | Sunny | 25° /14° | 4.1 mm | 6 | |
| Aug. 8 | Sunny | 27° /14° | 0.5 mm | 7 | |
| Aug. 9 | Sunny | 26° /13° | 0 mm | 6.6 | |
| Aug. 10 | Sunny | 28° /12° | 0 mm | 6.9 | |
| Aug. 11 | Sunny | 28° /12° | 0 mm | 7.3 | |
| Aug. 12 | Partly cloudy | 26° /13° | 0 mm | 5.4 | |
| Aug. 13 | Sunny | 28° /13° | 0 mm | 3.4 | |
| Aug. 14 | Sunny | 30° /14° | 0 mm | 8 | |
| Aug. 15 | Sunny | 28° /14° | 0 mm | 7 | |
| Aug. 16 | Partly cloudy | 24° /12° | 0 mm | 6 | |
| Aug. 17 | Partly cloudy | 26° /12° | 0.6 mm | 7 | |
| Aug. 18 |  Patchy rain possible | 20° /15° | 1.3 mm | 4 | |
| Aug. 19 | Sunny | 28° /17° | 0 mm | 7 | |
| Aug. 20 | Partly cloudy | 29° /14° | 0 mm | 7 | |
| Aug. 21 | Sunny | 27° /14° | 0 mm | 7 | |
| Aug. 22 | Sunny | 28° /14° | 0 mm | 7 | |
| Aug. 23 | Partly cloudy | 24° /13° | 0.8 mm | 6 | |
| Aug. 24 |  Overcast | 25° /13° | 4.1 mm | 6 | |
| Aug. 25 | Sunny | 29° /14° | 0.2 mm | 7 | |
| Aug. 26 | Sunny | 27° /13° | 1.4 mm | 7 | |
| Aug. 27 | Patchy rain possible | 24° /13° | 2.2 mm | 5 | |
| Aug. 28 | Partly cloudy | 24° /12° | 0.1 mm | 6 | |
| Aug. 29 | Sunny | 25° /12° | 2.2 mm | 6 | |
| Aug. 30 | Overcast | 25° /13° | 0.3 mm | 6 | |
| Aug. 31 | Sunny | 24° /12° | 1.2 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.
Change Month
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 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 King County during August?
In August, King County can expect light to moderate rainfall, totaling 36.9 mm across approximately 7 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 💧
Typically, King County has 7 rainy days in August with a total of 36.9 mm of rainfall.
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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