When to Go
Southern Oregon's population centers, which all lie chiefly in the valleys, tend to be warmer and quite a bit sunnier than Eugene and Portland to the north, receiving almost no snow in winter and only 2 to 3 inches of rain per month. In summer, temperatures regularly climb into the 90s, but the low humidity makes for a generally comfortable climate. This makes most of the region quite pleasant to visit year-round, with spring and fall generally offering the best balance of sunny and mild weather.
The exceptions, during the colder months, are southern Oregon's mountainous areas to the east and west, which are covered with snow from fall through spring. Some of the roads leading from the Umpqua and Rogue valleys up to Crater Lake are closed because of snow from mid-October through June, making summer the prime time to visit.