Alderton Washington Climate Data

Monthly Average Climate Data for Alderton Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January35.1 °F47.5 °F6.17 in.
February35.0 °F50.1 °F3.88 in.
March37.4 °F54.3 °F4.53 in.
April40.7 °F59.3 °F3.44 in.
May46.2 °F66.5 °F2.3 in.
June50.9 °F71.0 °F2.03 in.
July54.3 °F77.6 °F0.83 in.
August54.3 °F78.0 °F1.21 in.
September50.0 °F72.1 °F1.57 in.
October43.8 °F61.1 °F4.35 in.
November38.3 °F52.1 °F6.57 in.
December34.6 °F46.5 °F6.23 in.
Annual43.4 °F61.3 °F43.11 in.

Climate Data for Alderton Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost40-50 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