Fullerton California Climate Data

Monthly Average Climate Data for Fullerton California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January46.5 °F68.5 °F3.12 in.
February47.5 °F68.5 °F3.36 in.
March50.0 °F70.0 °F1.94 in.
April52.2 °F73.2 °F0.64 in.
May56.6 °F75.2 °F0.27 in.
June60.2 °F78.8 °F0.08 in.
July63.6 °F84.0 °F0.04 in.
August64.2 °F85.9 °F0.0 in.
September62.5 °F85.1 °F0.12 in.
October57.7 °F80.4 °F0.49 in.
November50.8 °F73.7 °F0.77 in.
December45.6 °F68.0 °F2.22 in.
Annual54.8 °F75.9 °F13.05 in.

Climate Data for Fullerton California

Average First Frost DateNo Frost
Average Last Frost Date
Average Days With FrostFrost Free
Plant Hardiness Zone - 2023Zone 10b : 35°F to 30°F
Plant Hardiness Zone - 2012Zone 10b : 35°F to 30°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsa - Hot-Summer Mediterranean Climate
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