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Crater Lake National Park
Weather

In general, summer weather is fairly predictable at Crater Lake. However, at times throughout the summer, there may be days when the lake is completely covered in clouds and fog. May and June can vary from warm, sunny days in the 60's to temperatures down into the 30's with several feet of snow and poor lake visibility.

July, August, and September are the best times for dry, warmer weather. An average daytime high temperature during these three months is in the 70's, but can range from the 40's through low 80's. Temperatures cool off rapidly in the evening, with a typical nighttime low around 40, while some nights dip below freezing. Summer thunderstorms occur from June through mid-September, bringing dramatic displays of lightning and high winds. Boat tours, guided walks, and evening programs may be canceled if lightning is viewed in the park. October usually presents cool but sunny days and brings the start of winter snowfall by mid-month.

Winter usually begins in early to mid October and lasts until June. November through April is assuredly snowy with poor visibility, fair to poor driving conditions, but wonderful skiing and snowshoeing opportunities. Temperatures during the winter months range from an average high of 43F to an average low of 19F.

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