| Rank | Precipitation | Date |
|---|---|---|
| 1 | 8.6 cm | August 7, 1989 |
| 2 | 7.3 cm | August 5, 2002 |
| 3 | 7.1 cm | September 27, 1965 |
| 4 | 6.6 cm | August 18, 1967 |
| 5 | 6.4 cm | August 23, 1954 |
| 6 | 6.3 cm | July 15, 1968 |
| 7 | 6.2 cm | May 9, 1962 |
| 8 | 6.0 cm | August 7, 2008 |
| 9 | 5.5 cm | November 3, 1969 |
| 10 | 5.3 cm | July 18, 2002 |
| 11 | 5.3 cm | August 27, 1989 |
| 12 | 5.2 cm | May 22, 2014 |
| 13 | 5.1 cm | June 5, 1984 |
| 14 | 4.8 cm | August 10, 1967 |
| 15 | 4.7 cm | July 30, 1972 |
| 16 | 4.6 cm | June 14, 1980 |
| 17 | 4.4 cm | August 6, 2002 |
| 18 | 4.4 cm | August 2, 1967 |
| 19 | 4.3 cm | November 3, 1970 |
| 20 | 4.2 cm | September 15, 1994 |