Deep snow often covers the middle elevations from December to May, but sub-zero temperatures are rare. Precipitation falls mostly between January and mid-May, but thunderstorms, rain and even snow can occur at any time of year.
Temperatures vary with elevation.
Even in the summer, backpackers in the highcountry can encounter nighttime temperatures in the low 30's, and occasionally even in the 20's. Always include some kind of rain gear. During the winter, low-hanging clouds often drift in from the west, obscuring the countryside for several days at a time. Sub-zero temperatures, however, are rare. In the summer, occasional afternoon thundershowers may occur.