Walnut Creek California Climate Data

Monthly Average Climate Data for Walnut Creek California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January40.2 °F56.9 °F5.0 in.
February41.7 °F60.9 °F4.77 in.
March44.1 °F65.4 °F3.38 in.
April46.5 °F69.5 °F1.64 in.
May50.6 °F74.6 °F0.8 in.
June54.1 °F81.1 °F0.12 in.
July56.4 °F85.5 °F0.01 in.
August56.5 °F85.5 °F0.04 in.
September55.0 °F83.9 °F0.07 in.
October50.6 °F76.5 °F1.1 in.
November43.8 °F65.0 °F2.36 in.
December39.7 °F57.0 °F4.82 in.
Annual48.3 °F71.8 °F24.11 in.

Climate Data for Walnut Creek 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 9b : 25°F to 20°F
Plant Hardiness Zone - 2012Zone 9b : 25°F to 20°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
2024 plantmaps.com