What is the Yellowstone weather like in Yellowstone and the West Yellowstone area? West Yellowstone mountain weather can be very unpredicable so you always want to be prepared. Dress in layers so that you can add or subtract for comfort. In winter you will want to use heavier layers.
Traditionally, West Yellowstone is a sunny place. You will want to bring sunscreen. Springtime tends to be the most wet and cloudy. Fall is crisp, cool and frequently sunny. Below is our average temperatures and precipitation for West Yellowstone, Montana:
Mean Minimum Mean High Snowfall AveragePrecip. Temparture Temparture Inches Inches
January -.01 23.4 30.1 2.39
February 3.2 30.8 23.4 1.67
March 7.3 36.8 22.6 1.74
April 19.3 46.4 9.6 1.51
May 29.1 58.5 4.1 2.17
June 36.1 68.3 .09 2.62
July 40.8 79.4 0.0 1.38
August 38.6 76.2 0.1 1.63
September 30.2 65.6 1.4 1.54
October 22.1 52.8 6.6 1.42
November 10.6 34.4 18.4 .90
December 1.9 25.0 26.1 2.37
Annual 143.3 22.34