Roslyn Washington Climate Data

Monthly Average Climate Data for Roslyn Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.4 °C1.5 °C174.75 mm
February-4.4 °C4.2 °C124.46 mm
March-2.4 °C7.8 °C92.46 mm
April0.3 °C11.8 °C57.4 mm
May4.2 °C16.7 °C45.47 mm
June7.8 °C19.9 °C29.72 mm
July10.9 °C25.2 °C15.75 mm
August10.5 °C25.8 °C12.45 mm
September6.3 °C21.4 °C34.54 mm
October1.7 °C13.5 °C112.01 mm
November-2 °C5.6 °C169.42 mm
December-4.7 °C1.2 °C207.26 mm
Annual2 °C12.9 °C1075.69 mm

Climate Data for Roslyn Washington

Average First Frost DateSep.11 - Sep. 20
Average Last Frost DateJun. 1 - Jun. 10
Average Days With Frost150-180 Days
Plant Hardiness Zone - 2023Zone 7a : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDsb - Humid Continental Climate - Dry Cool Summer
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