| Rank | Precipitation | Date |
|---|---|---|
| 1 | 10.0 cm | June 18, 1956 |
| 2 | 9.1 cm | July 15, 1964 |
| 3 | 8.6 cm | August 11, 1907 |
| 4 | 8.3 cm | September 18, 1975 |
| 5 | 8.2 cm | September 21, 1970 |
| 6 | 7.9 cm | September 4, 1941 |
| 7 | 7.7 cm | September 20, 1912 |
| 8 | 7.7 cm | June 13, 1976 |
| 9 | 7.6 cm | June 3, 1953 |
| 10 | 7.5 cm | August 12, 1985 |
| 11 | 7.5 cm | March 22, 2009 |
| 12 | 7.4 cm | July 1, 1994 |
| 13 | 7.1 cm | July 11, 1977 |
| 14 | 7.1 cm | August 22, 1933 |
| 15 | 7.0 cm | September 4, 1965 |
| 16 | 6.9 cm | October 3, 2016 |
| 17 | 6.8 cm | August 12, 1989 |
| 18 | 6.8 cm | July 20, 1949 |
| 19 | 6.6 cm | August 21, 2020 |
| 20 | 6.6 cm | June 27, 1944 |