| Rank | Precipitation | Date |
|---|---|---|
| 1 | 7.5 cm | August 15, 1975 |
| 2 | 7.4 cm | August 18, 2008 |
| 3 | 7.4 cm | August 20, 1960 |
| 4 | 6.8 cm | November 9, 1861 |
| 5 | 6.3 cm | June 2, 1932 |
| 6 | 6.1 cm | July 27, 1997 |
| 7 | 5.8 cm | August 16, 2000 |
| 8 | 5.6 cm | June 3, 1932 |
| 9 | 5.3 cm | October 20, 1896 |
| 10 | 5.3 cm | August 6, 1967 |
| 10 | 5.3 cm | September 15, 1937 |
| 12 | 5.2 cm | August 11, 1954 |
| 13 | 5.0 cm | September 13, 1902 |
| 14 | 4.9 cm | September 5, 1912 |
| 15 | 4.9 cm | July 29, 1988 |
| 16 | 4.9 cm | August 6, 1952 |
| 17 | 4.8 cm | August 24, 1963 |
| 18 | 4.6 cm | September 1, 1940 |
| 19 | 4.6 cm | August 23, 1883 |
| 20 | 4.6 cm | August 11, 1935 |