Diamond Bar California Climate Data

Monthly Average Climate Data for Diamond Bar California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January7.1 °C19.9 °C89.41 mm
February7.4 °C20.1 °C106.93 mm
March8.6 °C21.7 °C67.06 mm
April9.8 °C23.1 °C22.1 mm
May12.2 °C25 °C9.14 mm
June14.2 °C27.9 °C2.54 mm
July16.6 °C31.5 °C2.29 mm
August16.9 °C32.6 °C0.25 mm
September15.9 °C31.2 °C4.06 mm
October13.1 °C27.3 °C22.35 mm
November9.4 °C23.5 °C24.38 mm
December6.7 °C19.5 °C70.61 mm
Annual11.5 °C25.3 °C421.12 mm

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 : -1.1°C to 1.7°C
Plant Hardiness Zone - 2012Zone 10a : -1.1°C to 1.7°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCsa - Hot-Summer Mediterranean Climate
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