From October to April, the Cascades and the Siskiyous wring moisture from Pacific storms, resulting in snow covered mountains in the higher elevations (above 3500 ft) to rain in the valleys. Depending upon the year and number of storms, snow can blanket much of the Monument's mountains well into May. Hiking and access to popular trails such as Pilot Rock, Hobart Bluff or parts of the Pacific Crest Trail may not be possible until late May or early June. Winter weather can vary greatly across the monument, due to the diversity of aspect and elevation of the terrain. It may be snowing at the Green Springs Summit, raining at the Emigrant Road Trailhead and be overcast and comparatively balmy at the former Box O Ranch.
From May - September, rainfall tapers off and a drying trend begins with warmer days. Many areas of the Monument are still covered in snow and may not be entirely accessible during the month of May and into June. Summer months are normally warm and dry with daytime mountain temperatures reaching the 80s - 90s in mid-summer, while night time temperatures cool down to the upper 40s-mid 50s. Lower elevation south facing exposures have been known to reach a 100 degrees and above some years
Current Local Weather Conditions - Green Springs, OR
Please note the weather data coordinates are located in the community of Green Springs at the intersection of Hwy 66 and East Hyatt Lake Road. Lat: 42.13 N, Lon: 122.46 W, Elev: 4736.