| Periods | Chad (hrs/year) | North (hrs/year) | Center (hrs/year) | South (hrs/year) |
| Wet | −23.47 |
| −16.04 | −24.92 |
| Dried | 73.12 | 76.92 | 47:72 | 42.56 |
| Return | −41.53 | −85.45 | −87.13 | −12.63 |