Riverside California Climate Data

Monthly Average Climate Data for Riverside California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January6.2 °C19.9 °C55.63 mm
February6.7 °C20.1 °C65.53 mm
March8.1 °C21.9 °C42.93 mm
April9.5 °C24.3 °C13.21 mm
May12.2 °C26.7 °C5.33 mm
June14.4 °C30.2 °C1.52 mm
July16.9 °C33.9 °C2.03 mm
August17.4 °C34.9 °C1.27 mm
September16 °C33.2 °C3.05 mm
October12.4 °C28.5 °C10.41 mm
November8.3 °C23.7 °C15.24 mm
December5.6 °C19.6 °C35.56 mm
Annual11.1 °C26.4 °C251.71 mm

Climate Data for Riverside California

Average First Frost DateDec. 11 - Dec. 20
Average Last Frost DateMar. 1 - Mar. 10
Average Days With Frost10-20 Days
Plant Hardiness Zone - 2023Zone 10a : -1.1°C to 1.7°C
Plant Hardiness Zone - 2012Zone 9b : -3.9°C to -1.1°C
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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