San Bernardino California Climate Data

Monthly Average Climate Data for San Bernardino California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January6.1 °C19.6 °C67.56 mm
February6.7 °C19.7 °C75.18 mm
March8.2 °C21.7 °C50.55 mm
April9.7 °C24.2 °C18.8 mm
May12.3 °C26.9 °C7.87 mm
June14.6 °C31.1 °C2.03 mm
July17.4 °C34.9 °C1.52 mm
August17.9 °C35.6 °C1.52 mm
September16.4 °C33.6 °C3.81 mm
October12.6 °C28.3 °C13.21 mm
November8.5 °C23.4 °C19.05 mm
December5.6 °C19.1 °C48.01 mm
Annual11.3 °C26.5 °C309.11 mm

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 : -1.1°C to 1.7°C
Plant Hardiness Zone - 2012Zone 9b : -3.9°C to -1.1°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCsa - Hot-Summer Mediterranean Climate
2024 plantmaps.com