Most Monthly Precipitation in Williamsport History

This is a list of the largest monthly precipitation totals ever recorded in Williamsport, Pennsylvania history from 1895–2024.

What Was the Wettest Month in Williamsport History?

According to NOAA records, the most precipitation that Williamsport, Pennsylvania has ever received in a single month is 16.8 inches which occurred in June 1972.

Month to date though April 25, 2024: 5.4 inches

Williamsport Most Rain in One Month

Rank	Precipitation	Month
1	16.8 inches	June 1972
2	16.0 inches	September 2011
3	12.6 inches	September 1999
4	12.0 inches	July 2018
5	10.6 inches	September 2004
6	10.3 inches	June 1916
7	10.1 inches	July 2023
8	10.0 inches	April 2011
9	10.0 inches	September 1975
10	9.9 inches	May 1919
11	9.8 inches	September 2018
12	9.7 inches	August 1912
12	9.7 inches	July 1992
14	9.6 inches	October 1990
15	9.4 inches	August 1933
16	9.3 inches	August 2018
17	9.2 inches	June 1982
18	9.0 inches	March 1936
19	8.9 inches	September 1934
20	8.8 inches	October 1929