Central Oregon is located on the east side of the Cascade Mountain range and enjoys low humidity levels and an arid, high desert climate. At 4,200 feet in elevation, most of the precipitation in Sunriver falls as snow during the winter months.
Rain shadow Effect
Sunriver and Central Oregon lie to the east of the Cascade Mountain range creating a rain shadow effect in the region. Most of the moisture from the Pacific storms stay to the west of the Cascade range in the valley. The high desert region therefore stays mostly high and dry. Sunriver averages about 34 inches of snow per year, typically beginning in early November and lasting thru late March/early April. Nearby Mt. Bachelor receives about 370 inches annually.
Sunriver experiences a climate typical of the high desert - warm days and cool, dry nights in the summer and cool and refreshing in the winter.