| Characteristics of the climatic zones | climatic zones | ||
| South Sudanese | Nortth Sudanese | Sub-Sahelian | |
| Annual rainfall | 900 à 1200 mm | 600 à 900 mm | 300 à 600 mm |
| Duration of rainy season (days) | 180 - 200 | 150 | 110 |
| Number of rainy days | 85 - 100 | 50-70 | <45 |
| Average annual temperature | 27˚C | 28˚C | 29˚C |
| Seasonal amplitude | 5˚C | 8˚C | 11˚C |
| Average air humidity - Dry season - Wet season |
25% 85% |
23% 75% |
20% 70% |
| Annual evaporation (class A tank) | 1800 - 2000 mm | 2600 - 2900 mm | 3200 - 3500 mm |