| Rank | Precipitation | Month |
|---|---|---|
| 1 | 8.9 inches | January 1907 |
| 2 | 6.0 inches | September 1982 |
| 3 | 4.6 inches | September 1961 |
| 4 | 4.6 inches | December 2010 |
| 5 | 4.4 inches | May 1995 |
| 6 | 4.1 inches | October 1946 |
| 7 | 4.1 inches | May 1917 |
| 8 | 4.0 inches | March 1961 |
| 9 | 3.9 inches | February 1980 |
| 10 | 3.7 inches | February 1962 |
| 11 | 3.7 inches | April 1914 |
| 12 | 3.7 inches | May 1981 |
| 13 | 3.6 inches | May 1907 |
| 14 | 3.5 inches | May 2015 |
| 15 | 3.5 inches | July 1914 |
| 16 | 3.5 inches | July 1936 |
| 17 | 3.5 inches | October 1994 |
| 18 | 3.4 inches | October 1941 |
| 19 | 3.4 inches | February 1905 |
| 20 | 3.4 inches | November 1983 |