Rantoul Average Rainfall by Month

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

Average temperature by month

What's the Rainiest Month in Rantoul?

In Rantoul, June has the greatest precipitation of any month. On average, Rantoul gets 4.7 inches of precipitation in June.

However, May is the month with the greatest chance of precipitation. 35.6% of days in May will have at least some rain.

What's the Driest Month in Rantoul?

In Rantoul, February has the least precipitation of any month. On average, Rantoul gets 1.91 inches of precipitation in February.

September is the month with the lowest chance of precipitation. 21.7% of days in September will have measurable rain.

Month	Precipitation	% Chance
January	2.24 in	26.7
February	1.91 in	24.2
March	2.52 in	28.3
April	3.91 in	33.9
May	4.29 in	35.6
June	4.66 in	32.6
July	4.39 in	28.0
August	3.76 in	25.7
September	3.26 in	21.7
October	3.16 in	26.0
November	3.07 in	27.5
December	2.09 in	23.8
Year	39.38 in	27.8

Weather Station Details

Years	Station	Coordinates
1893–2023	Rantoul	location