Bonney Lake Washington Climate Data

Monthly Average Climate Data for Bonney Lake Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January34.4 °F46.1 °F6.31 in.
February34.2 °F48.5 °F4.26 in.
March36.5 °F52.8 °F4.99 in.
April39.6 °F57.8 °F4.03 in.
May45.1 °F64.8 °F2.92 in.
June49.6 °F69.3 °F2.46 in.
July53.1 °F76.1 °F1.01 in.
August53.4 °F76.9 °F1.29 in.
September49.3 °F70.8 °F1.89 in.
October42.9 °F59.8 °F4.62 in.
November37.5 °F50.7 °F6.87 in.
December33.9 °F45.2 °F6.26 in.
Annual42.5 °F59.9 °F46.91 in.

Climate Data for Bonney Lake Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost40-50 Days
Plant Hardiness Zone - 2023Zone 8b : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate