Clayton California Climate Data

Monthly Average Climate Data for Clayton California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January4 °C13.3 °C98.04 mm
February4.9 °C15.6 °C96.01 mm
March6 °C18.1 °C67.06 mm
April7.4 °C20.7 °C39.12 mm
May9.8 °C23.4 °C17.02 mm
June11.9 °C27.4 °C3.56 mm
July13.3 °C30 °C0.25 mm
August13.6 °C30 °C0.76 mm
September12.6 °C28.9 °C2.03 mm
October9.9 °C24.1 °C23.11 mm
November6.1 °C17.9 °C49.53 mm
December3.8 °C13.3 °C98.3 mm
Annual8.6 °C21.9 °C494.79 mm

Climate Data for Clayton California

Average First Frost DateDec. 11 - Dec. 20
Average Last Frost DateFeb. 21 - Feb. 29
Average Days With Frost5-10 Days
Plant Hardiness Zone - 2023Zone 9b : -3.9°C to -1.1°C
Plant Hardiness Zone - 2012Zone 9a : -6.7°C to -3.9°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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