| Month | ETo Penman-Monteith (mm/day) | Kc-value | CWR (mm/day) | Days of the month | CWR (mm/month) | Effective rainfall (mm/month) | CWR (mm/month) |
| Jan | 5.6 | 0.6 | 3.36 | 31 | 104 | 0.0 | 104 |
| Feb | 6.3 | 0.7 | 4.41 | 28 | 123 | 0.0 | 123 |
| March | 7.2 | 0.8 | 5.4 | 31 | 167 | 0.0 | 167 |
| April | 7.2 | 0.8 | 5.76 | 30 | 173 | 0.0 | 173 |
| May | 6.7 | 1.1 | 7.37 | 31 | 228 | 21.0 | 207 |
| June | 6.3 | 1.3 | 8.19 | 30 | 246 | 55.0 | 191 |
| July | 4.6 | 1.2 | 5.52 | 31 | 171 | 52.7 | 118 |
| Aug | 4.2 | 1.0 | 4.2 | 31 | 130 | 90.6 | 40 |
| Sept | 4.6 | 1.0 | 4.6 | 30 | 138 | 46.2 | 92 |
| Oct | 4.9 | 1.0 | 4.9 | 31 | 152 | 12.5 | 139 |
| Nov | 5.4 | 1.0 | 5.4 | 30 | 162 | 0.0 | 162 |
| Dec | 5.1 | 0.9 | 4.59 | 31 | 142 | 0.0 | 142 |
| Total | 68.1 | 11.4 | 63.7 | 365 | 1938 | 278.0 | 1660 |
| Mean | 5.7 | 0.9 | 5.3 | 30.4 | 161 | 23.2 | 138 |