Custer Washington Climate Data

Monthly Average Climate Data for Custer Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January34.8 °F45.0 °F5.86 in.
February35.2 °F47.7 °F3.61 in.
March37.6 °F51.6 °F4.55 in.
April41.3 °F57.7 °F3.2 in.
May46.5 °F63.9 °F2.58 in.
June51.1 °F68.1 °F1.92 in.
July54.0 °F73.2 °F1.21 in.
August53.8 °F73.8 °F1.22 in.
September49.7 °F68.2 °F2.29 in.
October43.9 °F58.9 °F4.52 in.
November38.7 °F50.2 °F6.24 in.
December34.5 °F44.5 °F5.47 in.
Annual43.4 °F58.6 °F42.67 in.

Climate Data for Custer Washington

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost50-75 Days
Plant Hardiness Zone - 2023Zone 8b : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8a : 10°F to 15°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate