Roche Harbor Washington Climate Data

Monthly Average Climate Data for Roche Harbor Washington

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January2.9 °C7.4 °C107.44 mm
February2.8 °C8.3 °C62.48 mm
March3.8 °C10.3 °C62.23 mm
April5.3 °C13.2 °C43.43 mm
May7.8 °C17 °C34.8 mm
June9.9 °C19.4 °C25.4 mm
July11.4 °C22.6 °C19.56 mm
August11.6 °C22.5 °C20.57 mm
September10.2 °C19.3 °C37.34 mm
October7.3 °C13.9 °C81.79 mm
November4.7 °C9.8 °C107.7 mm
December2.9 °C7.3 °C103.89 mm
Annual6.7 °C14.3 °C706.63 mm

Climate Data for Roche Harbor Washington

Average First Frost DateDec. 1 - Dec. 10
Average Last Frost DateMar. 21 - Mar. 31
Average Days With Frost20-30 Days
Plant Hardiness Zone - 2023Zone 9a : -6.7°C to -3.9°C
Plant Hardiness Zone - 2012Zone 8b : -9.4°C to -6.7°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate