Thornton California Climate Data

Monthly Average Climate Data for Thornton California

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January3.7 °C13.2 °C95.25 mm
February4.9 °C16.1 °C84.33 mm
March6.6 °C18.9 °C68.58 mm
April8.1 °C21.9 °C35.81 mm
May10.8 °C25.9 °C18.54 mm
June13.1 °C29.6 °C6.35 mm
July14.4 °C31.9 °C0 mm
August14.3 °C31.8 °C0.51 mm
September12.9 °C30.4 °C2.03 mm
October9.6 °C25.6 °C20.32 mm
November5.4 °C18.3 °C43.69 mm
December3.3 °C13.4 °C86.87 mm
Annual8.9 °C23.1 °C462.28 mm

Climate Data for Thornton California

Average First Frost DateDec. 1 - Dec. 10
Average Last Frost DateFeb. 11 - Feb. 20
Average Days With Frost10-20 Days
Plant Hardiness Zone - 2023Zone 9b : -3.9°C to -1.1°C
Plant Hardiness Zone - 2012Zone 9b : -3.9°C to -1.1°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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