| Rank | Precipitation | Month |
|---|---|---|
| 1 | 13.4 cm | June 1898 |
| 2 | 11.4 cm | July 1932 |
| 3 | 10.3 cm | July 1884 |
| 4 | 9.9 cm | August 1928 |
| 5 | 7.9 cm | July 1958 |
| 6 | 7.2 cm | July 1974 |
| 6 | 7.2 cm | July 1973 |
| 8 | 7.0 cm | June 1885 |
| 9 | 7.0 cm | June 1936 |
| 10 | 6.9 cm | October 1940 |
| 11 | 6.8 cm | June 1966 |
| 12 | 6.8 cm | September 1897 |
| 13 | 6.3 cm | August 1894 |
| 14 | 6.1 cm | June 1989 |
| 15 | 5.9 cm | June 1934 |
| 16 | 5.9 cm | May 1953 |
| 17 | 5.7 cm | May 2000 |
| 18 | 5.7 cm | October 2005 |
| 19 | 5.6 cm | May 1958 |
| 20 | 5.6 cm | April 1895 |