| Rank | Precipitation | Date |
|---|---|---|
| 1 | 13.1 cm | August 8, 1978 |
| 2 | 10.7 cm | August 12, 1948 |
| 3 | 10.3 cm | August 4, 2014 |
| 4 | 7.9 cm | August 11, 1964 |
| 5 | 7.9 cm | August 2, 1910 |
| 6 | 7.7 cm | August 13, 1948 |
| 7 | 7.6 cm | June 8, 1905 |
| 8 | 7.3 cm | July 1, 1954 |
| 9 | 7.2 cm | July 18, 1927 |
| 10 | 7.1 cm | May 22, 2007 |
| 11 | 6.8 cm | June 4, 1901 |
| 12 | 6.5 cm | July 7, 1906 |
| 13 | 6.4 cm | July 15, 1951 |
| 14 | 6.3 cm | June 19, 1977 |
| 15 | 6.1 cm | July 4, 1958 |
| 16 | 6.1 cm | July 22, 1959 |
| 17 | 6.0 cm | May 11, 1899 |
| 18 | 6.0 cm | August 8, 1912 |
| 19 | 5.9 cm | July 14, 1927 |
| 20 | 5.9 cm | January 13, 1948 |