Cornelius Oregon Climate Data

Monthly Average Climate Data for Cornelius Oregon

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January1.8 °C8.3 °C169.16 mm
February1.8 °C10.4 °C121.41 mm
March3.2 °C13.1 °C115.57 mm
April4.9 °C16.1 °C79.5 mm
May8 °C20.1 °C52.58 mm
June10.4 °C22.9 °C33.53 mm
July12.6 °C27.4 °C7.87 mm
August12.5 °C27.8 °C12.19 mm
September10.1 °C24.6 °C32.51 mm
October6.6 °C17.7 °C87.38 mm
November3.7 °C11.4 °C162.05 mm
December1.6 °C7.8 °C202.44 mm
Annual6.4 °C17.3 °C1076.19 mm

Climate Data for Cornelius 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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