Sonoma County (Santa Rosa)
August
Weather in Sonoma County for August 2025
Your guide to Sonoma County weather in August - trends and predictions
In general, the average temperature in Sonoma County at the beginning of August is 29.7 °F. As the month progressed, temperatures tended to remain steady, reaching an average of 29.7 °F by the end of August.
Precipitation in Sonoma County during August is a rare event, with an average of fewer than 2 rainy days.
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30
Dry days
1
Rainy days
0
Snow days
29°/13°
Temperatures
15 km/h
Avg max wind
65 %
Avg humidity
Sonoma County in August average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  28° | 2 29° | 3 28° | ||||
| 4  29° | 5 30° | 6  33° | 7 31° | 8 26° | 9 27° | 10 28° |
| 11 25° | 12 27° | 13 29° | 14 31° | 15  30° | 16 30° | 17 26° |
| 18 25° | 19 28° | 20 29° | 21  26° | 22 26° | 23 27° | 24 27° |
| 25  27° | 26 30° | 27 31° | 28 31° | 29 30° | 30 30° | 31 29° |
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Temperatures trend during August in Sonoma 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 | Overcast | 28° /11° | 0 mm | 7 | |
| Aug. 2 | Overcast | 29° /11° | 0 mm | 7 | |
| Aug. 3 | Overcast | 28° /11° | 0 mm | 7 | |
| Aug. 4 | Partly cloudy | 29° /11° | 0 mm | 7 | |
| Aug. 5 | Partly cloudy | 30° /11° | 0 mm | 8 | |
| Aug. 6 | Sunny | 33° /14° | 0 mm | 8 | |
| Aug. 7 | Partly cloudy | 31° /14° | 0 mm | 8 | |
| Aug. 8 | Overcast | 26° /11° | 0 mm | 6 | |
| Aug. 9 | Overcast | 27° /11° | 0 mm | 7 | |
| Aug. 10 | Overcast | 28° /11° | 0 mm | 7 | |
| Aug. 11 | Overcast | 25° /11° | 0 mm | 7 | |
| Aug. 12 | Overcast | 27° /10° | 0 mm | 7 | |
| Aug. 13 | Overcast | 29° /10° | 0 mm | 7 | |
| Aug. 14 | Overcast | 31° /12° | 0 mm | 7 | |
| Aug. 15 | Cloudy | 30° /12° | 0 mm | 7 | |
| Aug. 16 | Cloudy | 30° /12° | 0 mm | 7 | |
| Aug. 17 | Cloudy | 26° /12° | 0 mm | 6 | |
| Aug. 18 | Overcast | 25° /12° | 0 mm | 6 | |
| Aug. 19 | Cloudy | 28° /10° | 0 mm | 7 | |
| Aug. 20 | Overcast | 29° /12° | 0 mm | 7 | |
| Aug. 21 | Patchy rain possible | 26° /12° | 0.4 mm | 6 | |
| Aug. 22 | Cloudy | 26° /12° | 0 mm | 6 | |
| Aug. 23 | Cloudy | 27° /11° | 0 mm | 6 | |
| Aug. 24 | Partly cloudy | 27° /12° | 0 mm | 7 | |
| Aug. 25 | Mist | 27° /10° | 0 mm | 7 | |
| Aug. 26 | Mist | 30° /12° | 0 mm | 8 | |
| Aug. 27 | Partly cloudy | 31° /11° | 0 mm | 8 | |
| Aug. 28 | Cloudy | 31° /12° | 0 mm | 8 | |
| Aug. 29 | Sunny | 30° /10° | 0 mm | 8 | |
| Aug. 30 | Sunny | 30° /11° | 0 mm | 8 | |
| Aug. 31 | Overcast | 29° /10° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Sonoma 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 Sonoma County forecast closer to your planned date for the most up-to-date weather information.
Sonoma County in August - FAQ
What are the expected maximum and minimum temperatures in Sonoma County during August?
Enjoy moderate daytime temperatures of up to 29° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sonoma County during August?
Rainfall in Sonoma County during August is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 1 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Sonoma County during August?
The average wind speed in Sonoma County during August is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Sonoma County
Explore the daily rainfall trends and prepare for Sonoma Countys August weather 💧
UV exposure in Sonoma County during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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Where is Sonoma County?Get accurate weather forecasts for Sonoma County, located at latitude 38.44 and longitude -122.714. Stay updated with localized weather information tailored for Sonoma County.
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