San Dimas California Climate Data

Monthly Average Climate Data for San Dimas California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January44.9 °F67.5 °F3.86 in.
February45.4 °F67.9 °F4.75 in.
March47.4 °F70.8 °F2.84 in.
April49.7 °F74.5 °F0.84 in.
May53.7 °F78.0 °F0.38 in.
June57.4 °F83.5 °F0.13 in.
July61.8 °F90.0 °F0.09 in.
August62.7 °F92.1 °F0.01 in.
September61.0 °F89.4 °F0.14 in.
October55.7 °F81.7 °F0.7 in.
November49.0 °F74.0 °F0.98 in.
December44.4 °F66.6 °F2.84 in.
Annual52.8 °F78 °F17.56 in.

Climate Data for San Dimas California

Average First Frost DateJan. 11 - Jan. 20
Average Last Frost DateFeb. 11 - Feb. 20
Average Days With Frost5-10 Days
Plant Hardiness Zone - 2023Zone 10a : 30°F to 25°F
Plant Hardiness Zone - 2012Zone 10a : 30°F to 25°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsa - Hot-Summer Mediterranean Climate