Cape Girardeau Average Rainfall by Month

This page shows the average precipitation in each month of the year in Cape Girardeau, Missouri. It is based on NOAA data for the years 1991–2020.
What's the Rainiest Month in Cape Girardeau?
In Cape Girardeau, May has the greatest precipitation of any month. On average, Cape Girardeau gets 5.2 inches of precipitation in May.
May is also the month where rain is most common. 39.9% of days in May will have at least some rain.
What's the Driest Month in Cape Girardeau?
In Cape Girardeau, August has the least precipitation of any month. On average, Cape Girardeau gets 3.14 inches of precipitation in August.
September is the month with the lowest chance of precipitation. 25.3% of days in September will have measurable rain.
Month Precipitation % Chance
January 3.51 in 28.9
February 3.31 in 31.1
March 4.65 in 37.6
April 5.18 in 36.7
May 5.23 in 39.9
June 3.80 in 33.8
July 3.63 in 30.8
August 3.14 in 25.9
September 3.63 in 25.3
October 3.62 in 27.8
November 4.33 in 32.1
December 3.65 in 30.3
Year 47.60 in 31.5
Weather Station Details
Years Station Coordinates
1960–2024 Cape Girardeau Municipal Airport location
1945–1960 Cape Girardeau Missour State University location
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