| Drought Index | Number of months and percent occurrence | |||||
| Extreme | Severe | Moderate | Mild | Normal | Total and % number of drought incidence/probability | |
| SPI-3 | 8 | 14 | 29 | 161 | 218 | 212 (49) |
| SPAI-3 | 9 | 19 | 40 | 147 | 215 | 215 (50) |
| SPI-6 | 11 | 19 | 45 | 123 | 229 | 198 (46) |
| SPAI-6 | 9 | 19 | 39 | 147 | 214 | 214 (50) |
| SPI-12 | 11 | 7 | 26 | 74 | 170 | 118 (28) |
| SPAI-12 | 9 | 19 | 38 | 147 | 208 | 213 (49) |