| Year | Average rain/10 years |
| 1901 | 137.8247 |
| 1910 | 137.8247 |
| 1920 | 137.0419 |
| 1930 | 135.0912 |
| 1940 | 136.6843 |
| 1950 | 134.2571 |
| 1960 | 133.1015 |
| 1970 | 140.1571 |
| 1980 | 139.6232 |
| 1990 | 133.0645 |
| 2000 | 127.3796 |
| 2010 | 134.3287 |
| 2015 | 130.0457 |