Most Monthly Precipitation in Indianapolis History

This is a list of the largest monthly precipitation totals ever recorded in Indianapolis, Indiana history from 1901–2024.

What Was the Wettest Month in Indianapolis History?

According to NOAA records, the most precipitation that Indianapolis, Indiana has ever received in a single month is 13.1 inches which occurred in July 2015.

Indianapolis Most Rain in One Month

Rank	Precipitation	Month
1	13.1 inches	July 2015
2	12.9 inches	September 1926
3	12.7 inches	May 1943
4	12.7 inches	January 1950
5	11.8 inches	July 1992
6	11.6 inches	April 1922
7	11.1 inches	July 1979
8	10.7 inches	March 1963
9	10.4 inches	September 2003
10	10.3 inches	June 1998
11	10.0 inches	June 1928
12	9.9 inches	May 1946
13	9.8 inches	August 1926
14	9.8 inches	May 1929
15	9.8 inches	July 1915
16	9.7 inches	June 2010
17	9.4 inches	January 2005
18	9.3 inches	May 1968
19	9.3 inches	March 1904
20	9.2 inches	May 1981