Graton California Climate Data

Monthly Average Climate Data for Graton California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January3.2 °C14.2 °C200.66 mm
February3.9 °C16.2 °C197.1 mm
March4.9 °C17.9 °C137.16 mm
April5.8 °C20.2 °C66.55 mm
May7.8 °C23.1 °C36.32 mm
June9.7 °C26.4 °C9.91 mm
July10.7 °C27.6 °C0.51 mm
August10.8 °C27.9 °C2.79 mm
September9.6 °C27.9 °C4.32 mm
October7.5 °C24.9 °C50.04 mm
November4.7 °C18.6 °C110.74 mm
December2.9 °C14.2 °C216.41 mm
Annual6.8 °C21.6 °C1032.51 mm

Climate Data for Graton California

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost30-40 Days
Plant Hardiness Zone - 2023Zone 9a : -6.7°C to -3.9°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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