| Tahun Data | : | 2004 |
| 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 | 14.151 | 13.661 | 5.168 | 2.818 | 0.000 | 0.000 | 10.119 | 10.762 | 0.000 | 9.976 | 14.093 | 5.931 |
| 2 | 0.000 | 1.051 | 39.087 | 31.686 | 0.000 | 1.648 | 8.150 | 0.000 | 6.889 | 23.468 | 60.359 | 2.721 |
| 3 | 8.479 | 1.051 | 10.739 | 8.484 | 1.601 | 2.727 | 2.337 | 0.000 | 7.130 | 7.723 | 16.222 | 0.000 |
| 4 | 22.600 | 0.000 | 7.149 | 0.390 | 14.347 | 7.671 | 16.916 | 0.000 | 0.000 | 3.786 | 23.238 | 1.926 |
| 5 | 14.211 | 10.148 | 22.468 | 13.640 | 66.600 | 5.963 | 3.291 | 0.000 | 5.054 | 7.482 | 9.055 | 0.000 |
| 6 | 58.305 | 1.171 | 2.692 | 0.000 | 17.247 | 48.392 | 30.356 | 0.000 | 0.000 | 0.000 | 0.000 | 5.503 |
| 7 | 0.000 | 0.000 | 17.114 | 2.188 | 0.634 | 14.353 | 6.889 | 12.391 | 9.988 | 3.636 | 7.706 | 1.406 |
| 8 | 23.853 | 1.291 | 0.000 | 6.235 | 0.000 | 0.000 | 0.000 | 10.443 | 13.568 | 2.344 | 8.785 | 7.918 |
| 9 | 0.000 | 11.199 | 0.000 | 1.978 | 0.000 | 22.953 | 0.000 | 0.000 | 2.497 | 1.142 | 0.000 | 18.465 |
| 10 | 0.000 | 0.120 | 0.000 | 59.265 | 0.997 | 0.000 | 2.030 | 0.000 | 25.813 | 49.671 | 8.096 | 13.818 |
| 11 | 0.000 | 0.000 | 0.000 | 3.118 | 1.812 | 0.000 | 1.845 | 0.000 | 11.462 | 10.667 | 20.090 | 0.000 |
| 12 | 6.001 | 9.728 | 0.000 | 0.929 | 0.000 | 0.000 | 9.442 | 0.000 | 10.921 | 33.655 | 51.723 | 4.739 |
| 13 | 31.586 | 0.000 | 0.000 | 14.689 | 0.000 | 0.000 | 4.767 | 0.000 | 31.017 | 7.212 | 43.298 | 20.208 |
| 14 | 9.494 | 0.000 | 9.749 | 17.207 | 0.000 | 0.000 | 8.150 | 4.407 | 6.378 | 20.343 | 3.628 | 6.389 |
| 15 | 11.434 | 0.000 | 25.903 | 0.000 | 0.483 | 0.000 | 16.977 | 6.451 | 17.118 | 0.000 | 4.348 | 4.311 |
| 16 | 9.076 | 0.000 | 0.000 | 41.728 | 0.000 | 0.000 | 11.164 | 0.000 | 0.000 | 3.065 | 14.003 | 10.578 |
| 17 | 13.554 | 7.386 | 0.000 | 35.673 | 0.000 | 0.000 | 0.000 | 0.000 | 20.879 | 9.405 | 6.507 | 7.093 |
| 18 | 26.749 | 4.173 | 0.000 | 12.321 | 0.000 | 1.468 | 0.000 | 6.707 | 18.833 | 17.458 | 8.755 | 34.331 |
| 19 | 0.000 | 31.436 | 0.526 | 27.999 | 0.000 | 1.229 | 0.892 | 0.000 | 0.000 | 18.690 | 2.489 | 28.217 |
| 20 | 10.986 | 3.483 | 0.000 | 1.919 | 0.000 | 1.588 | 1.753 | 0.000 | 0.000 | 15.385 | 4.258 | 1.834 |
| 21 | 1.463 | 21.648 | 9.037 | 27.339 | 32.530 | 20.735 | 0.000 | 8.974 | 0.000 | 11.058 | 6.327 | 4.769 |
| 22 | 0.000 | 7.416 | 1.455 | 38.161 | 16.703 | 8.750 | 0.000 | 8.719 | 13.809 | 13.011 | 1.169 | 46.988 |
| 23 | 4.807 | 0.000 | 0.000 | 24.941 | 29.086 | 0.000 | 0.431 | 6.355 | 19.916 | 0.000 | 1.679 | 0.520 |
| 24 | 0.000 | 19.036 | 0.000 | 2.458 | 9.091 | 3.805 | 0.308 | 7.601 | 0.000 | 24.220 | 37.391 | 19.046 |
| 25 | 0.000 | 5.074 | 1.393 | 6.535 | 14.951 | 27.357 | 0.000 | 0.862 | 29.513 | 3.065 | 16.941 | 19.657 |
| 26 | 11.076 | 5.194 | 0.000 | 20.744 | 8.215 | 31.373 | 14.855 | 0.000 | 27.678 | 14.604 | 17.031 | 0.000 |
| 27 | 33.496 | 13.481 | 0.000 | 29.497 | 2.416 | 1.199 | 0.492 | 0.192 | 3.851 | 26.984 | 12.713 | 15.072 |
| 28 | 15.166 | 5.495 | 6.778 | 13.610 | 28.754 | 0.000 | 7.627 | 4.024 | 29.152 | 13.101 | 30.104 | 2.446 |
| 29 | 12.240 | 10.904 | 10.089 | 11.032 | 8.487 | 10.458 | 0.738 | 1.277 | 37.064 | 15.235 | 0.000 | 16.570 |
| 30 | 19.286 | - | 0.000 | 5.486 | 11.085 | 4.315 | 7.904 | 0.000 | 0.000 | 7.392 | 5.817 | 2.446 |
| 31 | 22.301 | - | 0.000 | - | 0.513 | - | 0.000 | 3.257 | - | 15.368 | - | 8.713 |
| Total | 380.31 | 184.15 | 169.35 | 462.07 | 265.55 | 215.98 | 167.43 | 92.42 | 348.53 | 389.15 | 435.83 | 311.62 |
| Hari Hujan | 22.00 | 21.00 | 15.00 | 28.00 | 19.00 | 18.00 | 23.00 | 15.00 | 21.00 | 28.00 | 27.00 | 27.00 |
| Max | 58.305 | 31.436 | 39.087 | 59.265 | 66.600 | 48.392 | 30.356 | 12.391 | 37.064 | 49.671 | 60.359 | 46.988 |
| Avg | 12.27 | 6.35 | 5.46 | 15.40 | 8.57 | 7.20 | 5.40 | 2.98 | 11.62 | 12.55 | 14.53 | 10.05 |
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 2004 adalah sebesar 3,422.38 mm. Dengan jumlah hari hujan tahunan adalah 264 hari (72.33%). Curah hujan harian maksimum tahunan yang tercatat adalah sebesar 66.60 mm yang terjadi pada tanggal 5 Mei 2004.
