Alamo California Climate Data

Monthly Average Climate Data for Alamo California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January40.1 °F56.9 °F5.18 in.
February41.5 °F60.9 °F5.14 in.
March43.7 °F65.1 °F3.72 in.
April45.9 °F69.7 °F1.77 in.
May49.9 °F74.2 °F0.89 in.
June53.4 °F81.4 °F0.14 in.
July56.0 °F86.0 °F0.02 in.
August56.2 °F86.0 °F0.04 in.
September54.8 °F84.5 °F0.09 in.
October50.7 °F75.8 °F1.11 in.
November43.6 °F64.8 °F2.31 in.
December39.6 °F56.9 °F5.26 in.
Annual48 °F71.9 °F25.67 in.

Climate Data for Alamo California

Average First Frost DateDec. 11 - Dec. 20
Average Last Frost DateFeb. 21 - Feb. 29
Average Days With Frost10-20 Days
Plant Hardiness Zone - 2023Zone 9b : 25°F to 20°F
Plant Hardiness Zone - 2012Zone 9b : 25°F to 20°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate