Graton California Climate Data

Monthly Average Climate Data for Graton California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January37.8 °F57.6 °F7.9 in.
February39.1 °F61.2 °F7.76 in.
March40.9 °F64.3 °F5.4 in.
April42.5 °F68.4 °F2.62 in.
May46.0 °F73.6 °F1.43 in.
June49.4 °F79.6 °F0.39 in.
July51.3 °F81.7 °F0.02 in.
August51.4 °F82.2 °F0.11 in.
September49.3 °F82.3 °F0.17 in.
October45.5 °F76.8 °F1.97 in.
November40.5 °F65.5 °F4.36 in.
December37.2 °F57.5 °F8.52 in.
Annual44.2 °F70.9 °F40.65 in.

Climate Data for Graton California

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 1 - Apr. 10
Average Days With Frost30-40 Days
Plant Hardiness Zone - 2023Zone 9a : 20°F to 25°F
Plant Hardiness Zone - 2012Zone 9a : 20°F to 25°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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