West Yellowstone Average Rainfall by Month

This page shows the average precipitation in each month of the year in West Yellowstone, Montana. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in West Yellowstone?
In West Yellowstone, May has the greatest precipitation of any month. On average, West Yellowstone gets 2.4 inches of precipitation in May.
However, February is the month with the greatest chance of precipitation. 42.5% of days in February will have at least some rain.
What's the Driest Month in West Yellowstone?
In West Yellowstone, August has the least precipitation of any month. On average, West Yellowstone gets 1.05 inches of precipitation in August.
August is also the month where rain is least common. 16.7% of days in August will have measurable rain.
Month Precipitation % Chance
January 2.33 in 41.3
February 2.28 in 42.5
March 2.15 in 32.9
April 2.41 in 34.5
May 2.44 in 33.0
June 2.12 in 28.7
July 1.26 in 18.9
August 1.05 in 16.7
September 1.31 in 17.2
October 1.84 in 25.4
November 2.40 in 36.1
December 2.94 in 42.8
Year 24.38 in 30.8
Weather Station Details
Years Station Coordinates
1997–2024 West Yellowstone location
1924–1996 West Yellowstone location
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