| Tahun Data | : | 1998 |
| Nama Stasiun | : | TRMM-0552 |
| Lokasi Stasiun | : | Desa Simpang Tonang Utara (Persiapan), Kecamatan Duo Koto, Pasaman, Provinsi Sumatera Barat |
| Longitude | : | 99.875000 |
| Latitude | : | 0.375000 |
| Tanggal | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 0.000 | 17.074 | 0.000 | 7.009 | 2.839 | 16.955 | 0.000 | 11.789 | 1.650 | 1.026 | 7.359 | 8.753 |
| 2 | 0.155 | 8.990 | 0.000 | 0.000 | 10.048 | 0.000 | 0.000 | 2.956 | 0.210 | 2.752 | 4.945 | 21.859 |
| 3 | 7.799 | 6.018 | 0.000 | 16.729 | 0.000 | 11.280 | 3.256 | 15.905 | 17.912 | 0.000 | 0.000 | 6.577 |
| 4 | 2.212 | 0.798 | 6.238 | 5.016 | 0.000 | 18.583 | 1.206 | 23.615 | 0.000 | 25.889 | 40.844 | 71.907 |
| 5 | 0.000 | 0.000 | 0.000 | 0.000 | 9.697 | 0.000 | 24.222 | 5.426 | 4.080 | 1.353 | 1.635 | 45.943 |
| 6 | 0.000 | 0.000 | 0.000 | 9.003 | 20.988 | 0.233 | 0.000 | 4.566 | 27.363 | 0.000 | 19.507 | 18.545 |
| 7 | 0.000 | 0.000 | 6.948 | 2.804 | 17.703 | 6.884 | 0.000 | 19.984 | 0.570 | 12.035 | 0.000 | 31.700 |
| 8 | 0.000 | 0.000 | 0.000 | 6.262 | 63.188 | 0.000 | 7.297 | 31.848 | 18.332 | 45.387 | 0.195 | 5.737 |
| 9 | 15.210 | 0.000 | 5.842 | 0.000 | 0.000 | 11.047 | 10.593 | 0.000 | 0.000 | 2.192 | 0.000 | 7.567 |
| 10 | 6.402 | 0.000 | 3.235 | 0.000 | 0.000 | 0.000 | 20.061 | 0.000 | 0.000 | 26.075 | 1.519 | 36.547 |
| 11 | 9.545 | 0.000 | 2.096 | 6.885 | 5.614 | 0.000 | 16.865 | 6.961 | 9.361 | 10.216 | 1.324 | 13.056 |
| 12 | 24.095 | 0.000 | 20.266 | 8.193 | 3.222 | 0.000 | 14.292 | 39.707 | 21.963 | 2.892 | 0.000 | 24.975 |
| 13 | 3.647 | 0.000 | 2.525 | 2.087 | 11.993 | 0.000 | 0.000 | 8.308 | 0.810 | 15.067 | 0.000 | 0.000 |
| 14 | 0.000 | 3.553 | 8.549 | 0.748 | 2.360 | 0.000 | 12.202 | 26.010 | 35.854 | 0.513 | 2.531 | 2.176 |
| 15 | 3.958 | 22.693 | 5.199 | 0.000 | 0.989 | 0.442 | 10.694 | 34.729 | 9.901 | 0.000 | 0.000 | 3.610 |
| 16 | 90.443 | 14.283 | 3.004 | 4.050 | 2.265 | 0.000 | 0.000 | 3.181 | 3.420 | 0.513 | 1.830 | 4.500 |
| 17 | 23.979 | 0.000 | 1.254 | 17.913 | 0.000 | 9.047 | 22.071 | 30.014 | 4.621 | 0.233 | 0.000 | 8.457 |
| 18 | 2.832 | 18.995 | 0.000 | 0.000 | 0.000 | 0.000 | 14.674 | 82.595 | 1.410 | 1.026 | 5.646 | 0.000 |
| 19 | 10.670 | 0.000 | 0.000 | 0.000 | 0.255 | 5.954 | 18.654 | 0.973 | 0.000 | 0.000 | 4.478 | 11.572 |
| 20 | 0.543 | 0.000 | 6.238 | 4.361 | 1.244 | 6.419 | 10.412 | 15.082 | 0.780 | 0.000 | 0.000 | 3.956 |
| 21 | 0.000 | 0.000 | 2.112 | 0.000 | 1.244 | 1.512 | 20.483 | 4.079 | 39.755 | 0.000 | 7.437 | 0.000 |
| 22 | 0.000 | 51.005 | 34.673 | 0.000 | 0.000 | 0.000 | 0.000 | 17.889 | 15.992 | 0.000 | 4.517 | 5.094 |
| 23 | 0.000 | 4.894 | 9.984 | 45.950 | 1.244 | 4.070 | 0.000 | 0.000 | 11.341 | 80.605 | 0.000 | 4.698 |
| 24 | 0.000 | 0.000 | 2.591 | 2.586 | 1.244 | 9.070 | 24.001 | 27.058 | 3.450 | 17.352 | 12.693 | 2.473 |
| 25 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 47.566 | 1.290 | 8.396 | 0.000 | 51.581 |
| 26 | 0.000 | 10.875 | 0.000 | 0.000 | 0.000 | 0.070 | 1.387 | 25.935 | 0.000 | 16.373 | 0.000 | 0.000 |
| 27 | 0.000 | 0.000 | 9.291 | 10.031 | 0.000 | 2.000 | 6.955 | 7.260 | 5.581 | 1.026 | 0.000 | 1.088 |
| 28 | 3.414 | 0.000 | 3.977 | 7.321 | 0.000 | 0.000 | 5.307 | 7.447 | 0.000 | 20.524 | 0.000 | 0.000 |
| 29 | 5.122 | - | 0.000 | 16.822 | 0.702 | 0.000 | 2.975 | 4.491 | 0.000 | 8.863 | 76.860 | 0.000 |
| 30 | 1.009 | - | 12.724 | 0.000 | 0.000 | 0.000 | 8.221 | 0.786 | 2.220 | 42.028 | 34.458 | 16.765 |
| 31 | 0.116 | - | 0.545 | - | 0.000 | - | 0.000 | 38.659 | - | 0.000 | - | 19.436 |
| Total | 211.15 | 159.18 | 147.29 | 173.77 | 156.84 | 103.57 | 255.83 | 544.82 | 237.87 | 342.34 | 227.78 | 428.57 |
| Hari Hujan | 18.00 | 11.00 | 20.00 | 18.00 | 18.00 | 15.00 | 21.00 | 28.00 | 23.00 | 23.00 | 17.00 | 25.00 |
| Max | 90.443 | 51.005 | 34.673 | 45.950 | 63.188 | 18.583 | 24.222 | 82.595 | 39.755 | 80.605 | 76.860 | 71.907 |
| Avg | 6.81 | 5.68 | 4.75 | 5.79 | 5.06 | 3.45 | 8.25 | 17.57 | 7.93 | 11.04 | 7.59 | 13.82 |
Berdasarkan data hujan TRMM di Grid TRMM-0552, yang terletak di Desa Simpang Tonang Utara (Persiapan), Kecamatan Duo Koto, Pasaman, Provinsi Sumatera Barat, curah hujan tahunan yang terjadi pada tahun 1998 adalah sebesar 2,988.99 mm. Dengan jumlah hari hujan tahunan adalah 237 hari (64.93%). Curah hujan harian maksimum tahunan yang tercatat adalah sebesar 90.44 mm yang terjadi pada tanggal 16 Januari 1998.
