Cosmopolis Washington Climate Data

Monthly Average Climate Data for Cosmopolis Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January36.9 °F47.6 °F13.96 in.
February36.2 °F50.2 °F8.14 in.
March37.9 °F53.2 °F9.84 in.
April40.4 °F57.4 °F6.43 in.
May45.4 °F63.0 °F3.48 in.
June49.5 °F66.2 °F2.49 in.
July52.8 °F70.9 °F1.0 in.
August52.8 °F72.5 °F1.57 in.
September49.7 °F69.6 °F2.85 in.
October44.1 °F60.5 °F8.46 in.
November39.1 °F52.1 °F13.64 in.
December36.1 °F46.8 °F13.41 in.
Annual43.4 °F59.2 °F85.27 in.

Climate Data for Cosmopolis Washington

Average First Frost DateNov. 11 - Nov. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost40-50 Days
Plant Hardiness Zone - 2023Zone 9a : 20°F to 25°F
Plant Hardiness Zone - 2012Zone 9a : 20°F to 25°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate