Chinook Washington Climate Data

Monthly Average Climate Data for Chinook Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January38.7 °F49.1 °F12.43 in.
February38.7 °F50.6 °F8.36 in.
March40.2 °F53.0 °F8.98 in.
April41.7 °F56.5 °F6.67 in.
May46.6 °F61.0 °F3.86 in.
June49.9 °F64.1 °F2.77 in.
July54.0 °F68.0 °F1.03 in.
August53.6 °F69.4 °F1.46 in.
September51.4 °F68.2 °F2.85 in.
October46.1 °F61.3 °F7.66 in.
November42.3 °F53.6 °F12.61 in.
December38.2 °F48.6 °F12.87 in.
Annual45.1 °F58.6 °F81.55 in.

Climate Data for Chinook Washington

Average First Frost DateNov. 1 - Nov. 10
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost40-50 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