A mild, oceanic climate is predominant in western oregon (all along the coast) which can make for a great summer get away. Along the coast you can expect a lot of rainfall (up to 200 inches per year) in the winter months, but in the summer in Astoria, for example, you can expect highs in from 50-55 degrees. A great cool off in the summer months. It is home to some of the best surfing in the state.
Bend, Oregon, one of the fastest growing cities in the state, is nearly the inverse of the western coastal area. Bend is a semi-arid climate (experiences cool nights and sunny days) and gets little rain fall per year (11 inches annually). However, some of the best skiing in the state can be found just outside of Bend at Mt. Bachelor
Finally, southern/central Oregon is a Mediterranean climate which can be a great summer time destination because of the relatively low humidity and and highs just around 90 F. River rafting, hiking and many other outdoor activities are easy to find in this part of Oregon.