Rochester Washington Climate Data

Monthly Average Climate Data for Rochester Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January34.7 °F46.9 °F8.13 in.
February34.2 °F50.1 °F5.54 in.
March36.0 °F54.6 °F6.23 in.
April38.7 °F59.5 °F4.27 in.
May44.1 °F66.5 °F2.59 in.
June48.4 °F70.8 °F1.84 in.
July51.9 °F77.4 °F0.61 in.
August51.9 °F78.2 °F1.02 in.
September47.8 °F72.8 °F2.02 in.
October42.1 °F61.2 °F5.83 in.
November37.1 °F51.7 °F10.1 in.
December34.3 °F45.9 °F8.83 in.
Annual41.8 °F61.3 °F57.01 in.

Climate Data for Rochester Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 8b : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8a : 10°F to 15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate