Most Monthly Precipitation in Quincy History

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

What Was the Wettest Month in Quincy History?

According to NOAA records, the most precipitation that Quincy, Illinois has ever received in a single month is 13.7 inches which occurred in May 1935.

Quincy Most Rain in One Month

Rank	Precipitation	Month
1	13.7 inches	May 1935
2	13.3 inches	May 1991
3	13.2 inches	July 1981
4	12.5 inches	June 1947
5	11.9 inches	June 2011
6	11.6 inches	September 1926
7	11.6 inches	July 1958
8	11.5 inches	March 1973
9	11.4 inches	May 2013
10	11.2 inches	November 1985
11	10.8 inches	September 1970
12	10.8 inches	October 1969
13	10.8 inches	August 1970
14	10.8 inches	September 1911
15	10.8 inches	August 1939
16	10.7 inches	August 2004
17	10.5 inches	September 1945
18	10.5 inches	September 1977
19	10.5 inches	September 1961
20	10.3 inches	October 1941