When you leave your campsite, please leave it prepared for possible thundershowers and wind. A sunny warm day may become fiercely stormy with wind, rain, sleet and sometimes snow. Without adequate clothing and gear, an easy day hike or boat trip can turn into a battle for survival. Exposure to wind, rain, or cold can result in hypothermia. Cold and snow linger into May, although temperatures gradually climb.
Nighttime lows fall below freezing.
Summer Click for more detailed information Daytime temperatures are usually in the 70s, occasionally reaching the 80s in the lower elevations. Weather can be pleasant, although temperatures average 10-20 degrees lower than summer readings. Nighttime lows can fall into the teens and lower. Snowstorms increase in frequency and intensity as the weeks go by or towards the end of the fall season. Temperatures often hover near zero throughout the day, occasionally reaching highs in the 20s.