DEMOGRAPHICS / CLIMATE

The Oregon climate zone known as the Willamette Valley — which encompasses the three largest cities of Portland, Salem, and Eugene — is also the most diversified agricultural region. Productive ranches, orchards, and farms surround bustling urban centers. The Mediterranean climate remains relatively mild throughout the year, with cool/wet winters and warm/dry summers. Typically, half the year’s rainfall and the heaviest clouds occur in the winter months from December through February. Extreme temperatures are rare and snowfall tends to be low, averaging 5-10 inches annually. As would be expected, the elevation has a significant effect on precipitation levels.

Oregon Climate Service
326 Strand Ag Hall
Oregon State University
Corvallis, OR 97331
541-737-8927
https://blogs.oregonstate.edu/orcs/

Average Monthly Temperatures
Month               High     Low
March               54.9      36.4
June                 71.8      49.2
September        72.9      47.1
December         45.2      32.5
Source: National Weather Service