Fort Irwin California Climate Data

Monthly Average Climate Data for Fort Irwin California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January35.7 °F58.9 °F0.75 in.
February38.9 °F61.9 °F1.1 in.
March43.4 °F68.4 °F0.66 in.
April48.1 °F74.6 °F0.14 in.
May55.8 °F83.6 °F0.08 in.
June64.1 °F94.1 °F0.02 in.
July71.4 °F99.6 °F0.19 in.
August69.8 °F98.8 °F0.14 in.
September64.3 °F91.8 °F0.18 in.
October51.6 °F79.7 °F0.2 in.
November39.3 °F67.5 °F0.25 in.
December34.2 °F57.4 °F0.53 in.
Annual51.4 °F78 °F4.24 in.

Climate Data for Fort Irwin California

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMar. 1 - Mar. 10
Average Days With Frost20-30 Days
Plant Hardiness Zone - 2023Zone 8b : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 9a : 20°F to 25°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSh - Hot Semi-Arid Climate
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