Oso Washington Climate Data

Monthly Average Climate Data for Oso Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January0.6 °C7.3 °C164.34 mm
February0.6 °C9.1 °C118.11 mm
March1.9 °C11.4 °C137.92 mm
April4.1 °C14.8 °C112.27 mm
May7 °C18.7 °C76.45 mm
June9.4 °C20.8 °C66.8 mm
July11.1 °C24.6 °C29.46 mm
August11.1 °C25.2 °C30.99 mm
September8.8 °C21.8 °C64.52 mm
October5.3 °C15.4 °C135.64 mm
November2.5 °C10 °C194.31 mm
December0.4 °C6.7 °C177.55 mm
Annual5.2 °C15.5 °C1308.36 mm

Climate Data for Oso Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 8b : -9.4°C to -6.7°C
Plant Hardiness Zone - 2012Zone 8b : -9.4°C to -6.7°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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