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Seasonal
Weather Information
Spring
Cold and snow linger into May, although temperatures gradually climb.
Early in spring, daytime temperatures average in the 40s to 50s; by
late May and June, they may reach the 60s and 70s. Nighttime lows fall
below freezing.
Summer
Daytime temperatures are usually in the 70s, occasionally reaching the
80s in the lower elevations. Nights are cool, temperatures may drop
in the 40s and 30s--sometimes even the 20s. June can be cool and rainy;
July and August tend to be somewhat drier, although afternoon thundershowers
are common.
Fall
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.
Winter
Temperatures often hover near zero throughout the day, occasionally
reaching highs in the 20s. Subzero nighttime lows are common. Annual
snowfall averages nearly 150 inches in most of the park. At higher elevations,
200-400 inches of snow have been recorded.
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