Forest Grove Oregon Climate Data

Monthly Average Climate Data for Forest Grove Oregon

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.7 °C8.2 °C178.82 mm
February1.7 °C10.3 °C128.52 mm
March3.1 °C13.1 °C120.9 mm
April4.7 °C15.9 °C82.8 mm
May7.8 °C20.1 °C52.83 mm
June10.2 °C22.8 °C33.02 mm
July12.5 °C27.3 °C7.62 mm
August12.4 °C27.8 °C11.94 mm
September10 °C24.6 °C32.51 mm
October6.4 °C17.7 °C90.17 mm
November3.6 °C11.3 °C168.4 mm
December1.4 °C7.7 °C212.34 mm
Annual6.3 °C17.2 °C1119.87 mm

Climate Data for Forest Grove Oregon

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 : -9.4°C to -6.7°C
Plant Hardiness Zone - 2012Zone 8b : -9.4°C to -6.7°C
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate
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