Cascadia Oregon Climate Data

Monthly Average Climate Data for Cascadia Oregon

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January33.5 °F45.7 °F8.08 in.
February33.8 °F49.6 °F6.37 in.
March35.6 °F54.1 °F7.06 in.
April38.5 °F58.4 °F6.74 in.
May43.7 °F65.1 °F4.62 in.
June47.8 °F70.7 °F3.12 in.
July51.4 °F79.2 °F0.64 in.
August50.5 °F79.8 °F0.82 in.
September46.6 °F74.1 °F2.34 in.
October41.6 °F62.2 °F5.36 in.
November36.9 °F51.0 °F9.14 in.
December33.4 °F44.4 °F9.61 in.
Annual41.1 °F61.2 °F63.9 in.

Climate Data for Cascadia Oregon

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateMay 1 - May 10
Average Days With Frost75-100 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