Sonoma California Climate Data

Monthly Average Climate Data for Sonoma California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January3.7 °C13.9 °C135.64 mm
February4.6 °C15.9 °C140.97 mm
March5.5 °C18.1 °C90.42 mm
April6.4 °C19.8 °C43.18 mm
May8.5 °C22.7 °C24.89 mm
June10.3 °C26.3 °C5.33 mm
July11.5 °C28.1 °C0.25 mm
August11.6 °C28.2 °C1.27 mm
September10.5 °C27.9 °C2.03 mm
October8.6 °C24.6 °C38.86 mm
November5.9 °C18.3 °C68.58 mm
December3.8 °C13.9 °C140.72 mm
Annual7.6 °C21.5 °C692.14 mm

Climate Data for Sonoma California

Average First Frost DateDec. 1 - Dec. 10
Average Last Frost DateMar. 11 - Mar. 20
Average Days With Frost10-20 Days
Plant Hardiness Zone - 2023Zone 9b : -3.9°C to -1.1°C
Plant Hardiness Zone - 2012Zone 9b : -3.9°C to -1.1°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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