Clayton California Climate Data

Monthly Average Climate Data for Clayton California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January39.2 °F56.0 °F3.86 in.
February40.9 °F60.1 °F3.78 in.
March42.8 °F64.5 °F2.64 in.
April45.4 °F69.2 °F1.54 in.
May49.7 °F74.1 °F0.67 in.
June53.5 °F81.4 °F0.14 in.
July56.0 °F86.0 °F0.01 in.
August56.4 °F86.0 °F0.03 in.
September54.7 °F84.1 °F0.08 in.
October49.9 °F75.4 °F0.91 in.
November42.9 °F64.2 °F1.95 in.
December38.9 °F56.0 °F3.87 in.
Annual47.5 °F71.4 °F19.48 in.

Climate Data for Clayton California

Average First Frost DateDec. 1 - Dec. 10
Average Last Frost DateFeb. 21 - Feb. 29
Average Days With Frost10-20 Days
Plant Hardiness Zone - 2023Zone 9b : 25°F to 20°F
Plant Hardiness Zone - 2012Zone 9a : 20°F to 25°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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