Forest Grove Oregon Climate Data

Monthly Average Climate Data for Forest Grove Oregon

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January35.0 °F46.7 °F7.04 in.
February35.1 °F50.6 °F5.06 in.
March37.5 °F55.5 °F4.76 in.
April40.5 °F60.7 °F3.26 in.
May46.1 °F68.1 °F2.08 in.
June50.4 °F73.1 °F1.3 in.
July54.5 °F81.2 °F0.3 in.
August54.3 °F82.0 °F0.47 in.
September50.0 °F76.2 °F1.28 in.
October43.6 °F63.8 °F3.55 in.
November38.4 °F52.4 °F6.63 in.
December34.6 °F45.8 °F8.36 in.
Annual43.3 °F63 °F44.09 in.

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 : 15°F to 20°F
Plant Hardiness Zone - 2012Zone 8b : 15°F to 20°F
Current Drought ConditionsNormal
Köppen Climate ClassificationCsb - Warm-Summer Mediterranean Climate