Missoula Average Rainfall by Month

This page shows the average precipitation (including snowfall) in each month of the year in Missoula, Montana. It is based on NOAA data for the years 1991–2020.

Average temperature by month

What's the Rainiest Month in Missoula?

In Missoula, June has the greatest precipitation of any month. On average, Missoula gets 2.1 inches of precipitation in June.

June is also the month where rain is most common. 41.6% of days in June will have at least some rain or snow.

What's the Driest Month in Missoula?

In Missoula, August has the least precipitation of any month. On average, Missoula gets 0.83 inches of precipitation in August.

July is the month with the lowest chance of precipitation. 19.2% of days in July will have measurable rain.

Month	Precipitation	% Chance
January	0.95 in	40.2
February	0.88 in	38.0
March	0.92 in	36.8
April	1.36 in	38.1
May	1.77 in	39.0
June	2.13 in	41.6
July	0.85 in	19.2
August	0.83 in	20.6
September	0.96 in	24.4
October	1.18 in	32.0
November	1.17 in	36.9
December	1.07 in	40.6
Year	14.07 in	33.9

Weather Station Details

Years	Station	Coordinates
1948–2024	Missoula International Airport	location
1893–1947	Missoula 6 NW WFO	location