| Drought Index | Number of months and percent occurrence |
| ||||
| Extreme | Severe | Moderate | Mild | Normal | Total and % number of drought incidence/probability | |
| SPI-3 | 14 | 46 | 36 | 91 | 363 | 187 (34) |
| SPAI-3 | 12 | 24 | 51 | 188 | 275 | 275 (50) |
| SPI-6 | 18 | 20 | 36 | 164 | 309 | 238 (43) |
| SPAI-6 | 12 | 24 | 50 | 188 | 274 | 274 (50) |
| SPI-12 | 20 | 12 | 17 | 71 | 321 | 220 (41) |
| SPAI-12 | 15 | 21 | 51 | 186 | 268 | 273 (50) |