Alta California Climate Data

Monthly Average Climate Data for Alta California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January35.1 °F49.8 °F10.8 in.
February34.7 °F51.4 °F10.44 in.
March36.2 °F55.6 °F9.57 in.
April39.2 °F60.6 °F5.41 in.
May45.7 °F69.0 °F3.33 in.
June53.1 °F78.8 °F1.0 in.
July60.6 °F86.6 °F0.08 in.
August60.9 °F86.4 °F0.13 in.
September55.2 °F81.2 °F0.55 in.
October47.6 °F69.6 °F3.07 in.
November39.2 °F55.9 °F6.5 in.
December34.5 °F48.1 °F11.91 in.
Annual45.2 °F66.1 °F62.79 in.

Climate Data for Alta California

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 9a : 20°F to 25°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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