Hercules California Climate Data

Monthly Average Climate Data for Hercules California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January5.8 °C13.3 °C96.01 mm
February6.6 °C15.6 °C104.39 mm
March7.8 °C17.8 °C67.56 mm
April8.9 °C19.6 °C33.02 mm
May10.8 °C21.7 °C15.49 mm
June12.4 °C23.9 °C4.06 mm
July13.4 °C25.1 °C0 mm
August13.6 °C25.1 °C1.02 mm
September13.1 °C25.4 °C1.78 mm
October11.3 °C23 °C21.34 mm
November8.1 °C17.8 °C51.31 mm
December5.8 °C13.6 °C100.84 mm
Annual9.8 °C20.2 °C496.82 mm

Climate Data for Hercules California

Average First Frost DateJan. 21 - Jan. 31
Average Last Frost DateJan. 21 - Jan. 31
Average Days With FrostFrost Free
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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