Bothell Washington Climate Data

Monthly Average Climate Data for Bothell Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January36.2 °F47.3 °F5.61 in.
February36.3 °F50.0 °F3.95 in.
March38.7 °F53.9 °F4.33 in.
April42.1 °F59.1 °F3.38 in.
May47.3 °F65.9 °F2.27 in.
June51.7 °F70.1 °F2.0 in.
July55.0 °F76.4 °F0.91 in.
August55.2 °F77.2 °F1.11 in.
September51.5 °F71.5 °F1.8 in.
October45.4 °F60.7 °F3.91 in.
November39.8 °F51.8 °F6.25 in.
December36.0 °F46.4 °F5.9 in.
Annual44.6 °F60.9 °F41.42 in.

Climate Data for Bothell Washington

Average First Frost DateNov. 11 - Nov. 20
Average Last Frost DateApr. 1 - Apr. 10
Average Days With Frost30-40 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