Jamestown Washington Climate Data

Monthly Average Climate Data for Jamestown Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January2.8 °C8 °C57.4 mm
February2.7 °C8.9 °C41.91 mm
March3.7 °C10.7 °C42.16 mm
April5.3 °C13.2 °C33.02 mm
May7.8 °C16 °C29.72 mm
June9.8 °C17.7 °C22.86 mm
July10.9 °C19.4 °C13.97 mm
August10.9 °C19.8 °C13.46 mm
September9.6 °C18.7 °C21.59 mm
October6.9 °C14.4 °C42.42 mm
November4.4 °C10.3 °C68.07 mm
December2.7 °C7.9 °C60.45 mm
Annual6.5 °C13.8 °C447.03 mm

Climate Data for Jamestown Washington

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost75-100 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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