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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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Average dry days
30
Dry days
Average rainy days
1
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/13°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
65 %
Avg humidity

Sonoma County in August average weather

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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
Overcast
28° /11° 0 mm 7
Aug. 2 Overcast
Overcast
29° /11° 0 mm 7
Aug. 3 Overcast
Overcast
28° /11° 0 mm 7
Aug. 4 Partly cloudy
Partly cloudy
29° /11° 0 mm 7
Aug. 5 Partly cloudy
Partly cloudy
30° /11° 0 mm 8
Aug. 6 Sunny
Sunny
33° /14° 0 mm 8
Aug. 7 Partly cloudy
Partly cloudy
31° /14° 0 mm 8
Aug. 8 Overcast
Overcast
26° /11° 0 mm 6
Aug. 9 Overcast
Overcast
27° /11° 0 mm 7
Aug. 10 Overcast
Overcast
28° /11° 0 mm 7
Aug. 11 Overcast
Overcast
25° /11° 0 mm 7
Aug. 12 Overcast
Overcast
27° /10° 0 mm 7
Aug. 13 Overcast
Overcast
29° /10° 0 mm 7
Aug. 14 Overcast
Overcast
31° /12° 0 mm 7
Aug. 15 Cloudy
Cloudy
30° /12° 0 mm 7
Aug. 16 Cloudy
Cloudy
30° /12° 0 mm 7
Aug. 17 Cloudy
Cloudy
26° /12° 0 mm 6
Aug. 18 Overcast
Overcast
25° /12° 0 mm 6
Aug. 19 Cloudy
Cloudy
28° /10° 0 mm 7
Aug. 20 Overcast
Overcast
29° /12° 0 mm 7
Aug. 21 Patchy rain possible
Patchy rain possible
26° /12° 0.4 mm 6
Aug. 22 Cloudy
Cloudy
26° /12° 0 mm 6
Aug. 23 Cloudy
Cloudy
27° /11° 0 mm 6
Aug. 24 Partly cloudy
Partly cloudy
27° /12° 0 mm 7
Aug. 25 Mist
Mist
27° /10° 0 mm 7
Aug. 26 Mist
Mist
30° /12° 0 mm 8
Aug. 27 Partly cloudy
Partly cloudy
31° /11° 0 mm 8
Aug. 28 Cloudy
Cloudy
31° /12° 0 mm 8
Aug. 29 Sunny
Sunny
30° /10° 0 mm 8
Aug. 30 Sunny
Sunny
30° /11° 0 mm 8
Aug. 31 Overcast
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.
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Location coordinates 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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