Diamond Bar California Climate Data

Monthly Average Climate Data for Diamond Bar California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January44.7 °F67.9 °F3.52 in.
February45.4 °F68.2 °F4.21 in.
March47.5 °F71.0 °F2.64 in.
April49.7 °F73.5 °F0.87 in.
May54.0 °F77.0 °F0.36 in.
June57.6 °F82.2 °F0.1 in.
July61.8 °F88.7 °F0.09 in.
August62.4 °F90.7 °F0.01 in.
September60.7 °F88.1 °F0.16 in.
October55.6 °F81.2 °F0.88 in.
November48.9 °F74.3 °F0.96 in.
December44.0 °F67.1 °F2.78 in.
Annual52.7 °F77.5 °F16.58 in.

Climate Data for Diamond Bar California

Average First Frost DateJan. 21 - Jan. 31
Average Last Frost DateJan. 21 - Jan. 31
Average Days With FrostFrost Rare
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
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