| Tahun Data | : | 1999 |
| Nama Stasiun | : | TRMM-0405 |
| Lokasi Stasiun | : | Desa Koto Nopan, Kecamatan Rao Utara, Pasaman, Provinsi Sumatera Barat |
| Longitude | : | 99.875000 |
| Latitude | : | 0.875000 |
| Tanggal | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 30.604 | 0.000 | 8.107 | 5.210 | 10.172 | 0.000 | 0.000 | 0.000 | 1.220 | 0.000 | 10.236 | 5.485 |
| 2 | 10.214 | 8.355 | 0.000 | 0.000 | 0.000 | 0.000 | 2.307 | 0.000 | 26.226 | 36.498 | 0.877 | 127.449 |
| 3 | 9.753 | 2.421 | 21.983 | 0.889 | 11.083 | 0.000 | 8.111 | 26.707 | 21.798 | 0.000 | 0.000 | 12.977 |
| 4 | 10.521 | 0.000 | 5.051 | 15.226 | 16.423 | 0.000 | 18.957 | 11.875 | 16.176 | 41.494 | 0.000 | 9.855 |
| 5 | 3.571 | 24.554 | 3.648 | 17.205 | 7.247 | 8.630 | 0.000 | 5.460 | 0.000 | 0.000 | 4.744 | 47.359 |
| 6 | 0.845 | 6.002 | 0.499 | 63.934 | 4.132 | 0.000 | 13.391 | 7.848 | 0.000 | 7.586 | 0.000 | 0.000 |
| 7 | 0.000 | 16.335 | 0.000 | 6.704 | 0.699 | 1.747 | 0.000 | 7.507 | 2.201 | 12.721 | 0.000 | 46.422 |
| 8 | 4.800 | 14.664 | 38.479 | 0.000 | 0.615 | 17.707 | 21.193 | 0.000 | 37.364 | 20.447 | 0.195 | 5.753 |
| 9 | 6.374 | 34.921 | 6.673 | 0.000 | 13.478 | 0.000 | 25.808 | 0.000 | 6.683 | 2.082 | 0.195 | 1.561 |
| 10 | 0.000 | 0.000 | 18.304 | 1.292 | 2.988 | 2.898 | 5.019 | 5.846 | 4.137 | 26.136 | 20.536 | 0.892 |
| 11 | 32.139 | 6.548 | 7.141 | 0.525 | 6.018 | 11.059 | 0.000 | 6.643 | 0.000 | 15.034 | 34.313 | 0.000 |
| 12 | 0.000 | 25.474 | 7.889 | 0.000 | 0.572 | 0.618 | 0.000 | 4.299 | 0.000 | 7.633 | 23.136 | 0.892 |
| 13 | 102.869 | 31.170 | 2.027 | 0.000 | 0.000 | 5.540 | 11.631 | 1.752 | 8.300 | 12.397 | 17.677 | 0.000 |
| 14 | 0.000 | 1.194 | 11.569 | 0.000 | 0.000 | 15.214 | 17.292 | 1.228 | 24.582 | 44.779 | 3.672 | 0.892 |
| 15 | 8.755 | 12.106 | 1.746 | 0.000 | 6.209 | 9.034 | 1.475 | 0.000 | 0.000 | 11.704 | 3.639 | 0.000 |
| 16 | 14.860 | 20.018 | 19.738 | 7.027 | 17.822 | 4.091 | 0.024 | 1.956 | 13.763 | 8.280 | 19.886 | 0.000 |
| 17 | 41.701 | 9.242 | 10.602 | 10.864 | 0.000 | 0.000 | 21.193 | 2.047 | 53.991 | 2.082 | 1.852 | 18.283 |
| 18 | 2.266 | 8.321 | 2.962 | 16.478 | 2.119 | 0.000 | 0.000 | 3.253 | 0.000 | 35.620 | 5.621 | 13.244 |
| 19 | 1.421 | 3.751 | 9.635 | 0.000 | 3.285 | 0.000 | 0.000 | 32.689 | 0.000 | 16.191 | 26.158 | 0.000 |
| 20 | 0.000 | 6.411 | 6.392 | 0.000 | 0.000 | 3.558 | 0.000 | 34.100 | 1.432 | 17.301 | 28.270 | 61.450 |
| 21 | 0.000 | 0.000 | 6.954 | 0.000 | 14.919 | 33.666 | 0.000 | 10.760 | 63.749 | 18.041 | 13.745 | 0.000 |
| 22 | 1.421 | 0.102 | 12.785 | 0.000 | 1.399 | 12.678 | 0.000 | 3.003 | 0.000 | 2.591 | 7.604 | 18.417 |
| 23 | 18.969 | 3.683 | 7.078 | 0.000 | 12.206 | 0.000 | 0.000 | 1.183 | 0.689 | 12.259 | 1.495 | 0.000 |
| 24 | 2.534 | 52.074 | 6.829 | 0.000 | 10.151 | 0.000 | 0.000 | 6.802 | 0.000 | 3.469 | 26.872 | 0.000 |
| 25 | 7.987 | 23.360 | 0.000 | 0.000 | 2.352 | 10.015 | 0.000 | 12.193 | 1.167 | 0.000 | 11.860 | 8.339 |
| 26 | 1.997 | 26.293 | 6.517 | 6.664 | 0.000 | 14.660 | 1.855 | 0.000 | 22.938 | 10.408 | 2.470 | 0.000 |
| 27 | 0.000 | 0.000 | 36.732 | 7.027 | 0.000 | 2.855 | 0.000 | 0.000 | 4.853 | 27.293 | 6.889 | 4.236 |
| 28 | 0.038 | 0.136 | 16.339 | 2.100 | 0.000 | 6.605 | 0.000 | 79.483 | 8.353 | 11.889 | 8.481 | 0.000 |
| 29 | 0.000 | - | 13.938 | 0.000 | 0.000 | 13.189 | 0.048 | 3.571 | 95.809 | 83.220 | 4.094 | 0.000 |
| 30 | 0.000 | - | 0.000 | 2.787 | 0.000 | 0.000 | 0.119 | 0.000 | 1.458 | 4.348 | 46.759 | 7.804 |
| 31 | 0.000 | - | 9.244 | - | 0.000 | - | 0.000 | 17.812 | - | 39.737 | - | 0.000 |
| Total | 313.64 | 337.14 | 298.86 | 163.93 | 143.89 | 173.76 | 148.42 | 288.02 | 416.89 | 531.24 | 331.28 | 391.31 |
| Hari Hujan | 21.00 | 23.00 | 27.00 | 15.00 | 20.00 | 18.00 | 15.00 | 23.00 | 21.00 | 27.00 | 26.00 | 18.00 |
| Max | 102.869 | 52.074 | 38.479 | 63.934 | 17.822 | 33.666 | 25.808 | 79.483 | 95.809 | 83.220 | 46.759 | 127.449 |
| Avg | 10.12 | 12.04 | 9.64 | 5.46 | 4.64 | 5.79 | 4.79 | 9.29 | 13.90 | 17.14 | 11.04 | 12.62 |
Berdasarkan data hujan TRMM di Grid TRMM-0405, yang terletak di Desa Koto Nopan, Kecamatan Rao Utara, Pasaman, Provinsi Sumatera Barat, curah hujan tahunan yang terjadi pada tahun 1999 adalah sebesar 3,538.38 mm. Dengan jumlah hari hujan tahunan adalah 254 hari (69.59%). Curah hujan harian maksimum tahunan yang tercatat adalah sebesar 127.45 mm yang terjadi pada tanggal 2 Desember 1999.
