Costa Mesa California Climate Data

Monthly Average Climate Data for Costa Mesa California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January47.0 °F67.1 °F2.6 in.
February47.9 °F66.9 °F2.98 in.
March50.4 °F68.1 °F1.65 in.
April52.4 °F68.6 °F0.65 in.
May56.7 °F70.2 °F0.25 in.
June60.1 °F72.6 °F0.09 in.
July63.4 °F76.7 °F0.07 in.
August64.1 °F78.8 °F0.01 in.
September62.6 °F78.7 °F0.11 in.
October58.0 °F75.4 °F0.44 in.
November51.4 °F72.1 °F0.74 in.
December46.7 °F66.9 °F1.96 in.
Annual55.1 °F71.8 °F11.55 in.

Climate Data for Costa Mesa 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 ClassificationBSk - Cold Semi-Arid Climate