Mill Valley California Climate Data

Monthly Average Climate Data for Mill Valley California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January6.1 °C13.7 °C196.85 mm
February7 °C15.8 °C188.21 mm
March7.6 °C17.5 °C117.6 mm
April8.4 °C18.6 °C58.17 mm
May9.8 °C20.1 °C31.24 mm
June11.3 °C22.1 °C9.65 mm
July12.1 °C22.4 °C0.51 mm
August12.5 °C22.8 °C2.54 mm
September12.2 °C23.6 °C3.81 mm
October10.8 °C22.3 °C38.61 mm
November8.2 °C17.8 °C102.36 mm
December6.1 °C13.8 °C211.07 mm
Annual9.3 °C19.2 °C960.62 mm

Climate Data for Mill Valley California

Average First Frost DateJan. 1 - Jan. 10
Average Last Frost DateFeb. 1 - Feb. 10
Average Days With FrostFrost Rare
Plant Hardiness Zone - 2023Zone 10a : -1.1°C to 1.7°C
Plant Hardiness Zone - 2012Zone 10a : -1.1°C to 1.7°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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