| Period | Mann-Kendall Test | Sen’s Slope Estimator | |||||
| MK-stat | z-stat | p-value | Trend | Slope | Lower | Upper | |
| Monthly | |||||||
| January | −4 | −0.0536 | 0.9572 | no | 0.0000 | −0.1270 | 0.1613 |
| February | −42 | −0.7319 | 0.4642 | no | −0.0685 | −0.4763 | 0.1218 |
| March | −81 | −1.4273 | 0.1535 | no | −0.4765 | −1.3370 | 0.1402 |
| April | −60 | −1.0528 | 0.2924 | no | −1.0023 | −2.6406 | 0.6910 |
| May | −24 | −0.4106 | 0.6814 | no | −0.2987 | −2.8548 | 1.6302 |
| June | 48 | 0.8390 | 0.4015 | no | 1.0505 | −1.6616 | 3.5510 |
| July | −3 | −0.0357 | 0.9715 | no | −0.0442 | −5.0038 | 4.4783 |
| August | −16 | −0.2678 | 0.7889 | no | −0.6002 | −7.4218 | 4.1165 |
| September | −22 | −0.3747 | 0.7079 | no | −0.4714 | −2.8660 | 1.7495 |
| October | 36 | 0.6245 | 0.5323 | no | 0.6759 | −1.2951 | 2.7586 |
| November | 94 | 1.6602 | 0.0969 | no | 0.8911 | −0.0672 | 2.9083 |
| December | −10 | −0.1606 | 0.8724 | no | −0.0126 | −0.4881 | 0.4084 |
| Seasonal | |||||||
| Rainy | −17 | −0.2855 | 0.7753 | no | −2.1274 | −15.3925 | 7.1414 |
| Dry | 9 | 0.1427 | 0.8865 | no | 0.1245 | −2.2904 | 2.4377 |
| Annual | −17 | −0.2855 | 0.7753 | no | −1.2853 | −14.8620 | 8.0543 |