Jamestown Washington Climate Data

Monthly Average Climate Data for Jamestown Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January37.0 °F46.4 °F2.26 in.
February36.9 °F48.0 °F1.65 in.
March38.6 °F51.3 °F1.66 in.
April41.6 °F55.7 °F1.3 in.
May46.1 °F60.8 °F1.17 in.
June49.7 °F63.8 °F0.9 in.
July51.7 °F66.9 °F0.55 in.
August51.7 °F67.6 °F0.53 in.
September49.3 °F65.6 °F0.85 in.
October44.5 °F58.0 °F1.67 in.
November40.0 °F50.6 °F2.68 in.
December36.8 °F46.2 °F2.38 in.
Annual43.7 °F56.7 °F17.6 in.

Climate Data for Jamestown Washington

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 1 - May 10
Average Days With Frost75-100 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
2024 plantmaps.com