Bellevue Washington Climate Data

Monthly Average Climate Data for Bellevue Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January36.2 °F47.2 °F5.65 in.
February36.3 °F49.9 °F4.06 in.
March38.7 °F53.8 °F4.36 in.
April42.1 °F58.9 °F3.42 in.
May47.5 °F65.7 °F2.25 in.
June51.9 °F70.0 °F2.11 in.
July55.4 °F76.4 °F0.82 in.
August55.6 °F77.1 °F1.05 in.
September51.8 °F71.3 °F1.84 in.
October45.6 °F60.5 °F4.26 in.
November39.8 °F51.7 °F6.29 in.
December36.0 °F46.3 °F6.09 in.
Annual44.7 °F60.7 °F42.2 in.

Climate Data for Bellevue Washington

Average First Frost DateNov. 11 - Nov. 20
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