Climate

Willamette Valley Oregon Climate

Willamette Valley Oregon Climate

This region experiences warm (but not hot) and dry summers, with no average monthly temperatures above 71.6 °F (22.0 °C). According to the Köppen Climate Classification system, Silverton has a warm-summer Mediterranean climate, abbreviated “Csb” on climate maps. The climate is relatively mild, considering Silverton’s northern latitude, and temperature fluctuations are generally small. Precipitation, primarily in the form of fall and winter rain, ranges between 40 and 50 inches (1,000 and 1,300 mm) annually. Silverton’s climate and its soil have made the area well suited for a variety of crops and for livestock grazing.