Kelso Washington Climate Data

Monthly Average Climate Data for Kelso Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January35.6 °F46.7 °F6.55 in.
February35.0 °F50.4 °F4.74 in.
March37.6 °F54.8 °F4.96 in.
April40.8 °F59.7 °F4.1 in.
May46.2 °F66.4 °F2.92 in.
June50.3 °F70.5 °F2.02 in.
July54.1 °F76.9 °F0.62 in.
August54.0 °F78.3 °F0.93 in.
September50.1 °F73.7 °F1.87 in.
October44.1 °F62.5 °F4.43 in.
November38.9 °F52.2 °F7.15 in.
December35.2 °F45.8 °F7.26 in.
Annual43.5 °F61.5 °F47.55 in.

Climate Data for Kelso Washington

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateMay 1 - May 10
Average Days With Frost50-75 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