Petaluma California Climate Data

Monthly Average Climate Data for Petaluma California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January38.3 °F56.7 °F5.92 in.
February39.9 °F60.4 °F6.17 in.
March41.5 °F63.8 °F3.29 in.
April43.1 °F66.1 °F1.6 in.
May46.5 °F70.7 °F0.86 in.
June49.9 °F76.6 °F0.29 in.
July52.0 °F79.7 °F0.01 in.
August52.4 °F80.1 °F0.06 in.
September50.2 °F80.3 °F0.08 in.
October46.4 °F75.2 °F1.09 in.
November41.3 °F64.8 °F2.45 in.
December37.9 °F56.9 °F5.81 in.
Annual45 °F69.3 °F27.63 in.

Climate Data for Petaluma California

Average First Frost DateNov. 21 - Nov. 30
Average Last Frost DateMar. 11 - Mar. 20
Average Days With Frost10-20 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