| Year | Average annual rainfall/4 years |
| 1990 | 52.96 |
| 1993 | 71.92 |
| 1996 | 51.47 |
| 1999 | 56.5 |
| 2002 | 51.58 |
| 2005 | 61.51 |
| 2008 | 50.12 |
| 2011 | 51.96 |
| 2014 | 44.85 |
| 2017 | 41.26 |
| 2020 | 56.09 |