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For Information about
Crater Lake National Park visit nps.gov, wikipedia or wikitravel.org just a few of many sources of our information:

Crater Lake National Park Climate & Weather

Climate:

Winter, especially, shapes the landscape in Crater Lake National Park. Snow begins to accumulate in October and stays around until June. The abbreviated summer is more consistent, with its cool nights, warm, dry days, and clear skies. Visitors to Crater Lake should prepare for any type of weather regardless of the month. There is still the possibility for cloudy, foggy days even in August.

Crater Lake Temperature & Precipitation Averages

Temp f Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec Avr
MAX 34.4 34.7 37.0 41.8 49.0 57.6 67.5 68.7 62.3 52.5 38.0 34.6 48.2
MEAN 26.1 26.6 28.0 31.9 38.3 45.4 53.6 54.5 49.1 41.3 30.0 26.5 37.6
MIN 17.7 18.4 19.0 22.0 27.5 33.2 39.7 40.3 35.9 30.1 22.0 18.3 27.0
Precip.                         total
Inches 9.81 8.47 7.79 5.34 3.50 2.03 .95 1.07 2.21 4.49 10.53 10.50 66.69

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