Crater Lake National Park - Climate

Crater Lake National Park by US-Parks

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. We realize this can make for a disappointing visit, but hope that you can appreciate the more subtle beauty presented to you on these days. 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 your "best bets" 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 Conditions 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/snowshoeing opportunities. Temperatures during the winter months range from an average high of 43F to an average low of 19F. More information on snowfall averages and why Crater Lake receives so much snow is also available.

Crater Lake National Park Weather Statistics

Five Year Averages, 1989 - 1993 Month Max. Temp. (F) Min. Temp.(F) Rainfall (in.) Snowfall (in.)

January 35 18 8.7 83

February 35 18 6.2 70

March 38 22 8.1 61

April 43 25 7.2 46

May 50 29 4.7 18

June 57 34 2.2 3

July 66 40 1.2 0

August 68 41 1.2 0

September 66 38 1 0

October 54 31 3.9 18

November 41 23 7.8 67

December 35 19 8.8 65