Roche Harbor Washington Climate Data

Monthly Average Climate Data for Roche Harbor Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January37.3 °F45.4 °F4.23 in.
February37.1 °F46.9 °F2.46 in.
March38.9 °F50.6 °F2.45 in.
April41.6 °F55.7 °F1.71 in.
May46.0 °F62.6 °F1.37 in.
June49.9 °F67.0 °F1.0 in.
July52.6 °F72.6 °F0.77 in.
August52.9 °F72.5 °F0.81 in.
September50.3 °F66.7 °F1.47 in.
October45.2 °F57.1 °F3.22 in.
November40.5 °F49.6 °F4.24 in.
December37.3 °F45.2 °F4.09 in.
Annual44.1 °F57.7 °F27.82 in.

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 : 20°F to 25°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate