| Rank | Precipitation | Date |
|---|---|---|
| 1 | 8.5 cm | August 8, 1978 |
| 2 | 8.2 cm | May 13, 1995 |
| 3 | 7.7 cm | July 11, 1937 |
| 4 | 7.4 cm | July 4, 1918 |
| 5 | 7.2 cm | July 8, 1954 |
| 6 | 7.0 cm | July 30, 2011 |
| 7 | 6.8 cm | July 20, 1956 |
| 8 | 6.7 cm | August 22, 1954 |
| 9 | 6.5 cm | June 20, 1990 |
| 10 | 6.3 cm | August 31, 1995 |
| 11 | 6.2 cm | June 19, 1969 |
| 12 | 6.0 cm | August 12, 1985 |
| 13 | 6.0 cm | August 12, 1948 |
| 14 | 5.8 cm | July 18, 1987 |
| 15 | 5.8 cm | August 16, 1941 |
| 16 | 5.6 cm | June 23, 1940 |
| 17 | 5.6 cm | June 19, 1977 |
| 18 | 5.5 cm | July 19, 1981 |
| 19 | 5.5 cm | February 8, 1946 |
| 20 | 5.4 cm | June 7, 1955 |