| Tahun Data | : | 2003 |
| Nama Stasiun | : | TRMM-0975 |
| Lokasi Stasiun | : | Desa Simatalu, Kecamatan Siberut Barat, Kepulauan Mentawai, Provinsi Sumatera Barat |
| Longitude | : | 98.875000 |
| Latitude | : | -1.375000 |
| Tanggal | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1.117 | 11.100 | 0.000 | 16.669 | 6.582 | 0.000 | 0.000 | 23.447 | 8.400 | 6.629 | 5.138 | 36.935 |
| 2 | 0.000 | 56.333 | 0.000 | 0.061 | 29.744 | 0.000 | 68.788 | 2.962 | 0.000 | 1.881 | 17.314 | 0.000 |
| 3 | 0.000 | 6.383 | 0.000 | 15.849 | 18.886 | 0.000 | 10.150 | 0.000 | 0.761 | 16.650 | 11.833 | 0.000 |
| 4 | 9.596 | 0.648 | 1.251 | 26.020 | 0.000 | 0.150 | 5.903 | 0.617 | 0.000 | 25.684 | 19.244 | 0.000 |
| 5 | 14.937 | 4.101 | 0.983 | 1.245 | 0.000 | 0.000 | 0.000 | 27.489 | 0.000 | 0.586 | 0.000 | 0.000 |
| 6 | 0.000 | 0.000 | 0.000 | 9.109 | 6.552 | 0.000 | 0.000 | 0.000 | 2.617 | 10.607 | 1.650 | 1.494 |
| 7 | 10.501 | 0.000 | 0.000 | 0.000 | 44.324 | 13.891 | 0.000 | 0.000 | 17.804 | 8.726 | 12.393 | 15.402 |
| 8 | 17.985 | 10.083 | 0.000 | 19.735 | 3.107 | 0.000 | 4.939 | 6.047 | 26.022 | 34.995 | 26.406 | 19.032 |
| 9 | 16.024 | 8.572 | 0.268 | 0.000 | 18.148 | 0.000 | 8.343 | 0.000 | 5.813 | 7.986 | 1.246 | 20.923 |
| 10 | 21.124 | 0.000 | 0.000 | 12.783 | 2.768 | 0.000 | 0.120 | 37.331 | 6.939 | 28.027 | 3.363 | 6.649 |
| 11 | 0.000 | 0.000 | 4.975 | 2.945 | 13.595 | 5.190 | 10.150 | 0.524 | 14.304 | 14.307 | 11.740 | 31.231 |
| 12 | 0.604 | 2.035 | 32.026 | 0.000 | 0.000 | 43.054 | 14.727 | 43.902 | 0.000 | 0.832 | 7.193 | 10.919 |
| 13 | 0.000 | 22.108 | 12.066 | 8.957 | 0.000 | 0.000 | 4.608 | 35.449 | 21.122 | 0.000 | 4.951 | 0.000 |
| 14 | 3.410 | 0.000 | 21.777 | 26.263 | 1.107 | 6.931 | 0.904 | 8.854 | 57.826 | 2.035 | 21.704 | 0.000 |
| 15 | 0.000 | 0.401 | 42.304 | 17.610 | 0.246 | 21.272 | 19.064 | 80.523 | 2.983 | 42.056 | 12.674 | 21.319 |
| 16 | 3.500 | 6.198 | 1.728 | 14.665 | 0.000 | 1.200 | 6.957 | 27.952 | 2.709 | 0.000 | 12.051 | 13.511 |
| 17 | 28.185 | 6.999 | 9.295 | 41.232 | 0.000 | 3.930 | 0.000 | 7.188 | 0.457 | 21.367 | 33.008 | 5.978 |
| 18 | 1.992 | 12.087 | 2.413 | 50.371 | 1.046 | 1.770 | 0.000 | 2.406 | 0.000 | 0.000 | 26.219 | 8.662 |
| 19 | 11.648 | 4.687 | 7.716 | 0.000 | 0.000 | 2.550 | 0.000 | 4.350 | 0.000 | 13.135 | 0.000 | 13.938 |
| 20 | 0.000 | 13.073 | 21.062 | 2.793 | 0.000 | 14.581 | 0.000 | 8.515 | 7.030 | 11.593 | 1.588 | 3.812 |
| 21 | 2.656 | 18.099 | 55.174 | 23.440 | 0.000 | 2.010 | 0.000 | 0.185 | 6.330 | 0.000 | 0.000 | 0.000 |
| 22 | 2.776 | 6.506 | 0.000 | 61.939 | 0.000 | 0.000 | 0.934 | 3.054 | 18.413 | 6.290 | 7.941 | 0.000 |
| 23 | 1.267 | 0.000 | 31.013 | 3.583 | 0.000 | 2.400 | 0.000 | 1.759 | 16.435 | 2.590 | 12.829 | 0.000 |
| 24 | 3.169 | 0.925 | 59.940 | 0.000 | 0.000 | 33.873 | 0.000 | 16.567 | 8.126 | 6.660 | 16.130 | 0.000 |
| 25 | 13.398 | 1.912 | 31.251 | 13.420 | 0.000 | 47.284 | 0.000 | 15.457 | 0.000 | 3.823 | 4.577 | 0.000 |
| 26 | 0.694 | 2.744 | 10.844 | 11.416 | 0.000 | 15.511 | 0.000 | 3.980 | 38.652 | 8.695 | 6.664 | 0.000 |
| 27 | 0.000 | 0.000 | 41.767 | 0.395 | 0.000 | 33.993 | 4.698 | 1.728 | 7.791 | 0.308 | 8.719 | 0.000 |
| 28 | 3.108 | 0.894 | 5.482 | 8.623 | 0.000 | 0.060 | 0.000 | 29.001 | 1.096 | 19.918 | 16.410 | 0.000 |
| 29 | 5.915 | - | 4.588 | 20.161 | 0.000 | 1.140 | 0.000 | 30.050 | 0.943 | 21.336 | 13.328 | 2.867 |
| 30 | 45.627 | - | 15.194 | 2.277 | 0.000 | 24.242 | 0.000 | 13.174 | 2.952 | 1.449 | 4.048 | 0.000 |
| 31 | 19.283 | - | 21.003 | - | 0.000 | - | 0.000 | 0.000 | - | 3.299 | - | 0.000 |
| Total | 238.52 | 195.89 | 434.12 | 411.56 | 146.11 | 275.03 | 160.29 | 432.51 | 275.53 | 321.46 | 320.36 | 212.67 |
| Hari Hujan | 23.00 | 21.00 | 23.00 | 25.00 | 12.00 | 20.00 | 14.00 | 26.00 | 23.00 | 27.00 | 27.00 | 15.00 |
| Max | 45.627 | 56.333 | 59.940 | 61.939 | 44.324 | 47.284 | 68.788 | 80.523 | 57.826 | 42.056 | 33.008 | 36.935 |
| Avg | 7.69 | 7.00 | 14.00 | 13.72 | 4.71 | 9.17 | 5.17 | 13.95 | 9.18 | 10.37 | 10.68 | 6.86 |
Berdasarkan data hujan TRMM di Grid TRMM-0975, yang terletak di Desa Simatalu, Kecamatan Siberut Barat, Kepulauan Mentawai, Provinsi Sumatera Barat, curah hujan tahunan yang terjadi pada tahun 2003 adalah sebesar 3,424.04 mm. Dengan jumlah hari hujan tahunan adalah 256 hari (70.14%). Curah hujan harian maksimum tahunan yang tercatat adalah sebesar 80.52 mm yang terjadi pada tanggal 15 Agustus 2003.
