Riverton Average Rainfall by Month

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

Average temperature by month

What's the Rainiest Month in Riverton?

In Riverton, May has the greatest precipitation of any month. On average, Riverton gets 2.0 inches of precipitation in May.

May is also the month where rain is most common. 28.3% of days in May will have at least some rain or snow.

What's the Driest Month in Riverton?

In Riverton, January has the least precipitation of any month. On average, Riverton gets 0.36 inches of precipitation in January.

January is also the month where rain is least common. 12.0% of days in January will have measurable rain or snow.

Month	Precipitation	% Chance
January	0.36 in	12.0
February	0.44 in	14.7
March	0.71 in	14.7
April	1.31 in	22.4
May	1.97 in	28.3
June	1.09 in	19.4
July	0.62 in	13.8
August	0.45 in	14.9
September	0.80 in	17.3
October	0.93 in	16.1
November	0.44 in	12.6
December	0.32 in	13.3
Year	9.49 in	16.7

Weather Station Details

Years	Station	Coordinates
1907–2024	Riverton	location