San Geronimo California Climate Data

Monthly Average Climate Data for San Geronimo California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January42.3 °F56.6 °F8.97 in.
February43.6 °F60.0 °F9.37 in.
March44.2 °F62.8 °F6.16 in.
April45.4 °F65.9 °F3.15 in.
May48.0 °F72.0 °F1.36 in.
June50.6 °F77.8 °F0.36 in.
July52.8 °F82.2 °F0.03 in.
August53.5 °F82.4 °F0.08 in.
September53.1 °F81.1 °F0.19 in.
October50.8 °F74.3 °F2.01 in.
November45.9 °F64.1 °F4.47 in.
December41.6 °F56.6 °F9.51 in.
Annual47.7 °F69.7 °F45.66 in.

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 : 25°F to 20°F
Plant Hardiness Zone - 2012Zone 9b : 25°F to 20°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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