Santa Rosa California Climate Data

Monthly Average Climate Data for Santa Rosa California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January37.7 °F57.5 °F6.36 in.
February39.1 °F60.9 °F6.37 in.
March40.9 °F64.3 °F4.54 in.
April42.5 °F67.8 °F2.16 in.
May46.1 °F72.9 °F1.33 in.
June49.6 °F79.0 °F0.36 in.
July51.5 °F81.3 °F0.03 in.
August51.6 °F82.0 °F0.09 in.
September49.5 °F81.9 °F0.14 in.
October45.8 °F76.4 °F1.59 in.
November40.5 °F65.4 °F3.35 in.
December37.1 °F57.6 °F6.23 in.
Annual44.3 °F70.6 °F32.55 in.

Climate Data for Santa Rosa California

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMar. 11 - Mar. 20
Average Days With Frost20-30 Days
Plant Hardiness Zone - 2023Zone 9a : 20°F to 25°F
Plant Hardiness Zone - 2012Zone 9b : 25°F to 20°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate