| Drought Index | Number of months and percent occurrence | |||||
| Extreme | Severe | Moderate | Mild | Normal | Total and % number of drought incidence/probability | |
| SPI-3 | 18 | 27 | 52 | 245 | 496 | 342 (41) |
| SPAI-3 | 19 | 37 | 77 | 286 | 414 | 419 (50) |
| SPI-6 | 5 | 9 | 17 | 309 | 495 | 340 (41) |
| SPAI-6 | 19 | 36 | 77 | 286 | 417 | 418 (50) |
| SPI-12 | 0 | 0 | 0 | 316 | 513 | 316 (38) |
| SPAI-12 | 18 | 37 | 76 | 284 | 414 | 415 (50) |