| Rank | Precipitation | Month |
|---|---|---|
| 1 | 5.9 inches | December 1983 |
| 2 | 5.8 inches | April 1986 |
| 3 | 5.8 inches | January 1911 |
| 4 | 5.8 inches | September 1982 |
| 5 | 5.4 inches | May 2011 |
| 6 | 5.4 inches | January 2017 |
| 7 | 5.3 inches | May 2015 |
| 8 | 5.2 inches | January 2005 |
| 9 | 5.1 inches | November 1985 |
| 10 | 5.1 inches | May 1906 |
| 11 | 5.0 inches | August 1977 |
| 12 | 5.0 inches | May 1898 |
| 13 | 4.9 inches | September 1973 |
| 14 | 4.9 inches | May 1987 |
| 15 | 4.9 inches | August 1983 |
| 16 | 4.9 inches | October 1946 |
| 17 | 4.9 inches | January 1907 |
| 18 | 4.8 inches | April 1944 |
| 19 | 4.8 inches | April 2005 |
| 20 | 4.8 inches | October 2004 |