Cornelius Oregon Climate Data

Monthly Average Climate Data for Cornelius Oregon

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January35.3 °F46.9 °F6.66 in.
February35.3 °F50.8 °F4.78 in.
March37.8 °F55.6 °F4.55 in.
April40.8 °F60.9 °F3.13 in.
May46.4 °F68.2 °F2.07 in.
June50.7 °F73.3 °F1.32 in.
July54.7 °F81.3 °F0.31 in.
August54.5 °F82.1 °F0.48 in.
September50.2 °F76.2 °F1.28 in.
October43.8 °F63.9 °F3.44 in.
November38.6 °F52.5 °F6.38 in.
December34.8 °F46.0 °F7.97 in.
Annual43.6 °F63.1 °F42.37 in.

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 : 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