Guerneville California Climate Data

Monthly Average Climate Data for Guerneville California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January3.6 °C14.1 °C231.39 mm
February4.2 °C16 °C235.97 mm
March5.2 °C17.6 °C169.67 mm
April6 °C19.6 °C82.04 mm
May7.7 °C22.5 °C47.5 mm
June9.4 °C25.4 °C6.1 mm
July10.4 °C26.1 °C1.27 mm
August10.7 °C27.1 °C1.78 mm
September9.5 °C26.3 °C3.56 mm
October7.6 °C23.9 °C53.34 mm
November5 °C18.4 °C123.19 mm
December3.2 °C14.2 °C280.42 mm
Annual6.9 °C20.9 °C1236.23 mm

Climate Data for Guerneville California

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMar. 21 - Mar. 31
Average Days With Frost20-30 Days
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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