San Bernardino California Climate Data

Monthly Average Climate Data for San Bernardino California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January43.0 °F67.2 °F2.66 in.
February44.0 °F67.5 °F2.96 in.
March46.7 °F71.0 °F1.99 in.
April49.4 °F75.6 °F0.74 in.
May54.2 °F80.5 °F0.31 in.
June58.3 °F87.9 °F0.08 in.
July63.3 °F94.9 °F0.06 in.
August64.2 °F96.0 °F0.06 in.
September61.5 °F92.5 °F0.15 in.
October54.7 °F82.9 °F0.52 in.
November47.3 °F74.1 °F0.75 in.
December42.1 °F66.4 °F1.89 in.
Annual52.4 °F79.7 °F12.17 in.

Climate Data for San Bernardino 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 10a : 30°F to 25°F
Plant Hardiness Zone - 2012Zone 9b : 25°F to 20°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsa - Hot-Summer Mediterranean Climate