| Rank | Precipitation | Date |
|---|---|---|
| 1 | 6.1 cm | July 11, 1954 |
| 2 | 5.9 cm | August 20, 1952 |
| 3 | 5.7 cm | June 24, 1975 |
| 4 | 5.3 cm | June 15, 2007 |
| 5 | 5.2 cm | June 28, 1970 |
| 6 | 5.1 cm | July 17, 2002 |
| 7 | 5.1 cm | June 25, 1953 |
| 8 | 4.7 cm | July 1, 1947 |
| 9 | 4.3 cm | August 21, 1970 |
| 10 | 4.3 cm | July 20, 1997 |
| 11 | 4.1 cm | September 26, 2010 |
| 12 | 4.1 cm | June 3, 1981 |
| 13 | 4.1 cm | June 22, 2017 |
| 14 | 4.0 cm | June 29, 2017 |
| 15 | 3.9 cm | September 27, 1965 |
| 16 | 3.8 cm | May 21, 1993 |
| 17 | 3.7 cm | August 1, 1978 |
| 18 | 3.7 cm | July 7, 2001 |
| 19 | 3.7 cm | July 31, 1967 |
| 20 | 3.6 cm | October 22, 1955 |