Sonoma County (Santa Rosa)
March
Weather in Sonoma County, California for March 2026
Your guide to Sonoma County weather in March - trends and predictions
In general, the average temperature in Sonoma County at the beginning of March is 11.1 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 13.1 °F by the end of March.
Sonoma County experiences heavy rainfall in March, with over 20 rainy days and an average total precipitation 217.2 mm.
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Temperatures
Rain 🌧️
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10
Dry days
21
Rainy days
0
Snow days
13°/5°
Temperatures
15 km/h
Avg max wind
84 %
Avg humidity
Sonoma County Weather March
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Temperatures trend during March in Sonoma County
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March weather in Sonoma County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Mar. 1 |  Light rain shower | 9° /6° | 8.8 mm | 2 | |
| Mar. 2 | Light rain shower | 10° /6° | 7.3 mm | 3 | |
| Mar. 3 | Light rain shower | 11° /4° | 2 mm | 3 | |
| Mar. 4 | Light rain shower | 10° /4° | 2.1 mm | 3 | |
| Mar. 5 | Light rain shower | 11° /6° | 2.3 mm | 3 | |
| Mar. 6 | Light rain shower | 13° /6° | 1 mm | 3 | |
| Mar. 7 |  Mist | 14° /2° | 0 mm | 3 | |
| Mar. 8 |  Sunny | 14° /3° | 0 mm | 4 | |
| Mar. 9 | Patchy rain possible | 13° /4° | 0.2 mm | 3 | |
| Mar. 10 |  Heavy rain | 12° /3° | 7.7 mm | 3 | |
| Mar. 11 | Patchy rain possible | 11° /2° | 0.2 mm | 3 | |
| Mar. 12 |  Light drizzle | 12° /6° | 31.2 mm | 3 | |
| Mar. 13 | Sunny | 13° /4° | 7.2 mm | 4 | |
| Mar. 14 | Sunny | 13° /4° | 23.5 mm | 4 | |
| Mar. 15 | Sunny | 16° /7° | 0 mm | 5 | |
| Mar. 16 | Sunny | 15° /7° | 26.3 mm | 4 | |
| Mar. 17 | Sunny | 16° /5° | 8.8 mm | 4 | |
| Mar. 18 | Sunny | 16° /4° | 0 mm | 5 | |
| Mar. 19 | Sunny | 14° /3° | 2.9 mm | 4 | |
| Mar. 20 |  Overcast | 16° /4° | 0 mm | 4 | |
| Mar. 21 |  Cloudy | 15° /5° | 0 mm | 4 | |
| Mar. 22 | Light rain shower | 15° /6° | 6.4 mm | 4 | |
| Mar. 23 | Light rain shower | 15° /5° | 6.1 mm | 4 | |
| Mar. 24 | Light rain shower | 19° /7° | 0.6 mm | 5 | |
| Mar. 25 |  Partly cloudy | 20° /6° | 0 mm | 6 | |
| Mar. 26 | Mist | 14° /6° | 5.9 mm | 4 | |
| Mar. 27 | Light rain shower | 12° /7° | 18.4 mm | 3 | |
| Mar. 28 | Light rain shower | 12° /6° | 2.4 mm | 3 | |
| Mar. 29 | Light rain shower | 10° /5° | 10.6 mm | 3 | |
| Mar. 30 | Patchy light drizzle | 12° /6° | 9.8 mm | 3 | |
| Mar. 31 | Patchy rain possible | 12° /6° | 25.6 mm | 3 | |
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Important Notice
Our weather forecast for Sonoma County in March 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.
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Sonoma County in March - FAQ
What are the expected maximum and minimum temperatures in Sonoma County during March?
During March, expect a variety of temperatures with highs around 13° and lows near 5°, suitable for diverse activities and preferences.
How much rainfall should be expected in Sonoma County during March?
Significant rainfall exceeding 217.2 mm is expected in Sonoma County during March, occurring over more than 21 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Sonoma County during March?
The average wind speed in Sonoma County during March is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
March rainfall patterns in Sonoma County
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