Tumwater Washington Climate Data

Monthly Average Climate Data for Tumwater Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January34.7 °F46.7 °F8.53 in.
February34.2 °F49.7 °F5.52 in.
March36.2 °F54.2 °F6.22 in.
April39.0 °F58.9 °F4.25 in.
May44.3 °F65.9 °F2.57 in.
June48.8 °F70.4 °F1.86 in.
July52.2 °F77.1 °F0.7 in.
August52.1 °F77.9 °F1.16 in.
September48.0 °F72.4 °F2.07 in.
October42.4 °F60.6 °F5.71 in.
November37.3 °F51.3 °F10.11 in.
December34.2 °F45.7 °F9.08 in.
Annual42 °F60.9 °F57.78 in.

Climate Data for Tumwater Washington

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 21 - May 31
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
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