When to Go
Although summer weather is usually beautiful, June can be cloudy and cool in the Willamette Valley. When the Willamette Valley heats up, the coast usually remains cool, with morning fog. Trails in the Cascades are often snowy until mid-July—find early summer hikes in the Columbia Gorge or along the Rogue River Trail.
Springtime is ideal for touring southeastern Oregon, unless you want to make it all the way to the top of Steens Mountain, which is usually closed by snow until early July.
Autumn’s first rains appear in September, but October’s weather often starts off clear and beautiful. Even after the rains start, remember that cloudy days with scattered rain are the norm, and that “sun breaks” are common.
Although the mountainous parts of the state accumulate huge amounts of snow during the winter, snowfall is rare on the coast and in the western valleys. Wintertime temperatures are usually above freezing, though the dampness can make it seem colder.
by Judy Jewell and W. C. McRae from Moon Oregon, 8th Edition, © Elizabeth & Mark Morris and Avalon Travel