| Month |
Maximum mean rainfall (mm) |
Observed year |
Coefficient of determination (%) |
| April |
52.6 |
2011 |
72.38 |
| May |
144.5 |
2007 |
86.63 |
| June |
110.2 |
2011 |
20.8 |
| July |
102.4 |
2011 |
44.21 |
| August |
73.4 |
2011 |
6.91 |
| September |
121.7 |
2008 |
70.6 |