Most Monthly Precipitation in Wilmington History

This is a list of the largest monthly precipitation totals ever recorded in Wilmington, Delaware history from 1894–2024.

What Was the Wettest Month in Wilmington History?

According to NOAA records, the most precipitation that Wilmington, Delaware has ever received in a single month is 14.9 inches which occurred in August 1911.

Wilmington Most Rain in One Month

Rank	Precipitation	Month
1	14.9 inches	August 1911
2	14.7 inches	August 2011
3	14.1 inches	July 1919
4	13.7 inches	June 2013
5	12.7 inches	September 1999
6	12.6 inches	July 1989
7	12.5 inches	June 2015
8	12.1 inches	August 1955
9	12.0 inches	May 1894
10	11.9 inches	June 2023
11	11.6 inches	July 1897
12	11.2 inches	August 1967
13	11.1 inches	August 1933
14	10.7 inches	August 1906
15	10.7 inches	August 1945
16	9.9 inches	July 1945
17	9.9 inches	June 2003
18	9.5 inches	August 1942
19	9.5 inches	September 1960
20	9.4 inches	June 2006