Ilwaco Washington Climate Data

Monthly Average Climate Data for Ilwaco Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January38.8 °F49.1 °F12.2 in.
February38.6 °F50.8 °F7.95 in.
March40.2 °F53.1 °F8.78 in.
April41.7 °F55.7 °F6.64 in.
May46.5 °F59.9 °F3.84 in.
June49.7 °F62.9 °F2.71 in.
July53.9 °F66.2 °F1.05 in.
August53.5 °F67.6 °F1.58 in.
September51.4 °F67.2 °F2.7 in.
October46.3 °F61.0 °F7.64 in.
November42.7 °F53.6 °F12.12 in.
December38.4 °F48.6 °F12.57 in.
Annual45.1 °F58 °F79.78 in.

Climate Data for Ilwaco 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