Weather

Spring snow flurries over Lamar Valley
Spring snow flurries roll through Lamar Valley. In Yellowstone it can snow during any month of the year, so bring lots of layers no matter when you plan to visit.

NPS / Neal Herbert

 

Since most of the park lies at an elevation of 6,000 feet above sea level or higher, unpredictability characterizes Yellowstone's weather. Expect big temperature swings, rain, or snow during every month of the year. No matter when you visit, bring a warm jacket, rain gear, and lots of layers.

Spring & Fall

Daytime temperatures range from 30F to the 60F (0 to 20C) with overnight lows in the teens to single digits (-5C to -20C). Snow is common in the spring and fall with regular accumulations of 12" in a 24-hour period.

Summer

Daytime temperatures are often around 70F (25C) and occasionally 80F (30C) at lower elevations. Nights are usually cool and temperatures may drop below freezing at higher elevations. Thunderstorms are common in the afternoons.

Winter

Temperatures range from zero to 20F (-20C to -5C) throughout the day. Sub-zero temperatures are common, especially at night and at higher elevations. The record low temperature is -66F (-54C). Snowfall is highly variable. While the average is 150 inches a year, it is not uncommon for higher elevations to get twice that amount.

For more information, check out our list of seasonal highlights, or read about planning a winter visit.

Forecasts

Monthly Averages

Month Average Maximum Temperature (F) Average Minimum Temperature (F) Average Precipitation (Inches) Average Total Snow Fall (Inches)
Jan 28.6 9.6 1.1 14.5
Feb 34.0 13.0 0.75 10.4
March 39.6 17.2 1.1 13.1
April 49.4 26.0 1.2 5.9
May 60.4 34.3 2.0 1.5
June 70.0 41.2 1.5 0.1
July 79.6 46.7 1.5 0.0
Aug 78.3 45.3 1.4 0.0
Sep 67.8 37.0 1.3 0.5
Oct 55.7 29.4 1.0 3.7
Nov 38.7 19.2 1.0 9.0
Dec 30.5 11.8 1.0 13.5
Annual 52.8 27.6 15.4 72.1

Climate

Climate consists of the long-term averages of daily weather, usually in 30-year periods. Learn how the climate is changing in Yellowstone.

Last updated: June 22, 2017

Contact the Park

Mailing Address:

P.O. Box 168
Yellowstone National Park, WY 82190-0168

Phone:

(307) 344-7381

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