Monte Rio California Climate Data

Monthly Average Climate Data for Monte Rio California

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January38.2 °F57.3 °F9.39 in.
February39.4 °F60.5 °F9.53 in.
March41.0 °F63.4 °F6.7 in.
April42.5 °F67.5 °F3.2 in.
May45.7 °F72.5 °F1.85 in.
June48.8 °F77.8 °F0.29 in.
July50.8 °F79.2 °F0.05 in.
August51.0 °F80.3 °F0.1 in.
September48.8 °F79.1 °F0.17 in.
October45.4 °F74.6 °F2.2 in.
November40.8 °F65.0 °F4.98 in.
December37.5 °F57.5 °F10.63 in.
Annual44.2 °F69.6 °F49.09 in.

Climate Data for Monte Rio 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 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