Oso Washington Climate Data

Monthly Average Climate Data for Oso Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January33.1 °F45.1 °F6.47 in.
February33.1 °F48.3 °F4.65 in.
March35.5 °F52.6 °F5.43 in.
April39.4 °F58.6 °F4.42 in.
May44.6 °F65.6 °F3.01 in.
June49.0 °F69.5 °F2.63 in.
July51.9 °F76.3 °F1.16 in.
August51.9 °F77.4 °F1.22 in.
September47.9 °F71.3 °F2.54 in.
October41.6 °F59.8 °F5.34 in.
November36.5 °F50.0 °F7.65 in.
December32.8 °F44.1 °F6.99 in.
Annual41.4 °F59.9 °F51.51 in.

Climate Data for Oso Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 8b : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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