| Rank | Precipitation | Month |
|---|---|---|
| 1 | 4.4 inches | May 1998 |
| 2 | 4.2 inches | December 1983 |
| 3 | 4.1 inches | May 1990 |
| 4 | 4.0 inches | May 1942 |
| 5 | 4.0 inches | May 2019 |
| 6 | 4.0 inches | May 2005 |
| 7 | 3.9 inches | January 1970 |
| 8 | 3.8 inches | May 1980 |
| 9 | 3.7 inches | March 1932 |
| 10 | 3.7 inches | February 2019 |
| 11 | 3.7 inches | February 1986 |
| 12 | 3.6 inches | November 1927 |
| 13 | 3.5 inches | February 1916 |
| 14 | 3.5 inches | January 1969 |
| 15 | 3.5 inches | November 1926 |
| 16 | 3.5 inches | March 1989 |
| 17 | 3.4 inches | December 1996 |
| 18 | 3.4 inches | December 1924 |
| 19 | 3.4 inches | June 1941 |
| 20 | 3.4 inches | November 1988 |