Most Monthly Precipitation in Hannibal History

This is a list of the largest monthly precipitation totals ever recorded in Hannibal, Missouri history from 1933–2024.

What Was the Wettest Month in Hannibal History?

According to NOAA records, the most precipitation that Hannibal, Missouri has ever received in a single month is 18.9 inches which occurred in July 1981.

Hannibal Most Rain in One Month

Rank	Precipitation	Month
1	18.9 inches	July 1981
2	17.3 inches	July 2010
3	13.4 inches	June 2015
4	13.3 inches	June 1947
5	12.9 inches	July 1958
6	11.5 inches	November 1985
7	11.4 inches	July 1949
8	11.4 inches	August 1995
9	11.0 inches	September 1945
10	10.9 inches	May 2013
11	10.8 inches	May 1995
12	10.8 inches	June 1945
13	10.8 inches	May 1935
14	10.7 inches	July 2015
15	10.5 inches	July 2008
16	10.5 inches	September 2008
17	10.4 inches	September 1941
18	10.2 inches	May 1991
19	10.2 inches	August 1977
20	10.2 inches	March 1973