Santa Rosa California Climate Data

Monthly Average Climate Data for Santa Rosa California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January3.2 °C14.2 °C161.54 mm
February3.9 °C16.1 °C161.8 mm
March4.9 °C17.9 °C115.32 mm
April5.8 °C19.9 °C54.86 mm
May7.8 °C22.7 °C33.78 mm
June9.8 °C26.1 °C9.14 mm
July10.8 °C27.4 °C0.76 mm
August10.9 °C27.8 °C2.29 mm
September9.7 °C27.7 °C3.56 mm
October7.7 °C24.7 °C40.39 mm
November4.7 °C18.6 °C85.09 mm
December2.8 °C14.2 °C158.24 mm
Annual6.8 °C21.4 °C826.77 mm

Climate Data for Santa Rosa California

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMar. 11 - Mar. 20
Average Days With Frost20-30 Days
Plant Hardiness Zone - 2023Zone 9a : -6.7°C to -3.9°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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