| Rank | Precipitation | Month |
|---|---|---|
| 1 | 20.9 cm | August 1986 |
| 2 | 20.8 cm | June 1971 |
| 3 | 20.2 cm | June 2000 |
| 4 | 19.2 cm | November 1985 |
| 5 | 18.5 cm | September 1986 |
| 6 | 18.2 cm | October 1955 |
| 7 | 17.9 cm | June 2015 |
| 8 | 16.8 cm | June 1996 |
| 9 | 16.7 cm | July 2006 |
| 10 | 16.0 cm | May 2017 |
| 11 | 15.9 cm | September 1977 |
| 12 | 15.8 cm | June 2017 |
| 13 | 15.6 cm | June 1982 |
| 14 | 15.5 cm | May 2003 |
| 15 | 15.2 cm | August 1992 |
| 16 | 15.2 cm | October 2006 |
| 17 | 15.0 cm | September 1996 |
| 18 | 14.8 cm | September 1987 |
| 19 | 14.7 cm | September 1999 |
| 20 | 14.5 cm | September 2021 |