| Country | Region | Mann Kendall trend test of rainfall onset dates (WDS) | Mann Kendall trend test of rainfall onset dates (WnDS) | ||
| Trend test | P-value | Trend test | P-value | ||
| Tanzania | Mwanza | Decreasing | 0.0316 | Decreasing | 0.0157 |
| Tanga | No trend | 0.3820 | No trend | 0.2834 | |
| Dar es Salaam (DSM) | No trend | 0.0867 | No trend | 0.1688 | |
| Simiyu | Decreasing | 0.0273 | Decreasing | 0.0368 | |
| Arusha | No trend | 0.9907 | No trend | 0.2828 | |
| Mbeya | No trend | 0.3158 | No trend | 0.4767 | |
| Iringa | No trend | 0.2991 | No trend | 0.2884 | |
| Mtwara | No trend | 0.8978 | No trend | 0.2481 | |
| Tabora | No trend | 0.1074 | No trend | 0.1023 | |
| Burundi | Bujumbura | No trend | 0.8519 | No trend | 0.3815 |
| Kirundo | No trend | 0.8887 | No trend | 0.1721 | |
| Gitega | No trend | 0.9721 | No trend | 0.7793 | |
| Makamba | No trend | 0.9256 | No trend | 0.2628 | |
| Rwanda | Byumba | No trend | 0.7086 | No trend | 0.1829 |
| Nyanza | No trend | 0.6576 | No trend | 0.2527 | |
| Wamagana | No trend | 0.9257 | No trend | 0.8701 | |
| Kibaye | No trend | 0.8609 | No trend | 0.2924 | |
| Kigali | No trend | 0.5753 | No trend | 0.4484 | |
| Uganda | Gulu | No trend | 0.9906 | No trend | 0.5235 |
| Kitgum | No trend | 0.4269 | No trend | 0.5197 | |
| Kampala | No trend | 0.0585 | No trend | 0.0756 | |
| Kasese | No trend | 0.6072 | No trend | 0.6319 | |
| Kenya | Marsabit | No trend | 0.7789 | No trend | 0.4696 |
| Kilifi | No trend | 0.3942 | No trend | 0.9257 | |
| Bungoma | No trend | 0.3097 | No trend | 0.5195 | |
| Nakuru | No trend | 0.9349 | No trend | 0.0886 | |
| Kakamega | No trend | 0.2121 | No trend | 0.2924 | |