Rio Dell California Climate Data

Monthly Average Climate Data for Rio Dell California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January40.7 °F55.2 °F8.44 in.
February41.0 °F56.4 °F7.17 in.
March41.7 °F57.7 °F6.61 in.
April43.3 °F59.7 °F3.78 in.
May46.8 °F65.1 °F1.81 in.
June49.5 °F65.4 °F0.66 in.
July52.2 °F67.9 °F0.16 in.
August52.4 °F70.0 °F0.1 in.
September49.9 °F70.6 °F0.46 in.
October46.3 °F69.6 °F2.28 in.
November43.0 °F59.2 °F4.9 in.
December40.1 °F54.2 °F8.99 in.
Annual45.6 °F62.6 °F45.36 in.

Climate Data for Rio Dell California

Average First Frost DateDec. 21 - Dec. 31
Average Last Frost DateFeb. 11 - Feb. 20
Average Days With Frost5-10 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
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