San Geronimo California Climate Data

Monthly Average Climate Data for San Geronimo California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January5.7 °C13.7 °C227.84 mm
February6.4 °C15.6 °C238 mm
March6.8 °C17.1 °C156.46 mm
April7.4 °C18.8 °C80.01 mm
May8.9 °C22.2 °C34.54 mm
June10.3 °C25.4 °C9.14 mm
July11.6 °C27.9 °C0.76 mm
August11.9 °C28 °C2.03 mm
September11.7 °C27.3 °C4.83 mm
October10.4 °C23.5 °C51.05 mm
November7.7 °C17.8 °C113.54 mm
December5.3 °C13.7 °C241.55 mm
Annual8.7 °C20.9 °C1159.75 mm

Climate Data for San Geronimo California

Average First Frost DateJan. 11 - Jan. 20
Average Last Frost DateFeb. 1 - Feb. 10
Average Days With FrostFrost Rare
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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