Grand Mound Washington Climate Data

Monthly Average Climate Data for Grand Mound Washington

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January34.8 °F46.7 °F7.52 in.
February34.3 °F50.0 °F5.16 in.
March36.2 °F54.5 °F5.44 in.
April38.9 °F59.7 °F3.83 in.
May44.3 °F66.7 °F2.33 in.
June48.6 °F71.2 °F1.72 in.
July52.2 °F77.9 °F0.57 in.
August52.2 °F78.9 °F0.88 in.
September48.0 °F73.3 °F1.78 in.
October42.4 °F61.8 °F5.12 in.
November37.3 °F51.5 °F8.91 in.
December34.3 °F45.8 °F8.19 in.
Annual42 °F61.5 °F51.45 in.

Climate Data for Grand Mound Washington

Average First Frost DateOct. 21 - Oct. 31
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