| Rank | Precipitation | Month |
|---|---|---|
| 1 | 8.1 inches | July 2021 |
| 2 | 7.9 inches | August 1955 |
| 3 | 6.8 inches | July 2017 |
| 4 | 6.2 inches | July 1921 |
| 5 | 6.2 inches | July 1981 |
| 6 | 5.9 inches | December 1914 |
| 7 | 5.6 inches | August 1935 |
| 8 | 5.6 inches | September 2011 |
| 9 | 5.5 inches | July 1919 |
| 10 | 5.5 inches | July 1990 |
| 11 | 5.4 inches | July 2006 |
| 12 | 5.2 inches | July 2007 |
| 13 | 5.2 inches | July 1958 |
| 14 | 5.1 inches | September 1964 |
| 15 | 5.1 inches | July 1955 |
| 16 | 5.0 inches | December 1965 |
| 17 | 5.0 inches | October 1983 |
| 18 | 5.0 inches | October 2000 |
| 19 | 4.9 inches | August 1993 |
| 20 | 4.8 inches | July 1964 |