| Tahun Data | : | 1999 |
| Nama Stasiun | : | TRMM-1517 |
| Lokasi Stasiun | : | Desa Sinaka, Kecamatan Pagai Selatan, Kepulauan Mentawai, Provinsi Sumatera Barat |
| Longitude | : | 100.375000 |
| Latitude | : | -3.125000 |
| Tanggal | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 23.329 | 0.000 | 2.075 | 0.000 | 29.166 | 0.000 | 0.000 | 0.000 | 1.440 | 32.295 | 0.061 | 0.000 |
| 2 | 9.771 | 2.332 | 10.707 | 0.000 | 80.221 | 0.000 | 10.228 | 0.000 | 9.300 | 20.387 | 7.544 | 2.827 |
| 3 | 27.628 | 3.980 | 21.384 | 0.546 | 32.348 | 0.000 | 14.266 | 15.443 | 5.400 | 13.020 | 3.424 | 9.624 |
| 4 | 0.000 | 1.368 | 0.060 | 0.000 | 13.228 | 1.225 | 3.832 | 27.887 | 0.660 | 32.234 | 8.635 | 8.541 |
| 5 | 0.932 | 0.000 | 4.361 | 0.000 | 1.414 | 1.225 | 9.550 | 55.891 | 0.000 | 58.756 | 10.453 | 0.150 |
| 6 | 0.000 | 0.000 | 1.444 | 1.214 | 6.128 | 0.329 | 19.012 | 110.664 | 0.000 | 30.250 | 40.812 | 8.090 |
| 7 | 0.000 | 0.000 | 5.835 | 45.692 | 2.357 | 25.637 | 12.173 | 22.209 | 0.000 | 41.255 | 39.115 | 6.346 |
| 8 | 26.726 | 0.124 | 18.797 | 3.368 | 0.471 | 17.779 | 52.613 | 23.504 | 5.730 | 76.376 | 0.757 | 32.419 |
| 9 | 12.176 | 0.000 | 7.880 | 3.975 | 32.848 | 1.763 | 0.472 | 102.427 | 8.160 | 16.418 | 0.000 | 8.992 |
| 10 | 1.744 | 1.555 | 2.947 | 2.184 | 1.031 | 14.432 | 0.206 | 2.177 | 3.540 | 24.176 | 4.060 | 7.158 |
| 11 | 5.381 | 0.000 | 41.805 | 1.669 | 0.560 | 9.801 | 2.859 | 4.354 | 0.510 | 4.360 | 4.272 | 47.486 |
| 12 | 2.195 | 2.643 | 8.602 | 10.103 | 6.894 | 0.418 | 2.387 | 38.447 | 0.510 | 19.485 | 29.268 | 10.466 |
| 13 | 0.000 | 1.555 | 4.000 | 2.549 | 2.445 | 0.000 | 4.480 | 42.359 | 0.000 | 2.075 | 47.144 | 67.365 |
| 14 | 1.834 | 0.000 | 5.925 | 0.000 | 2.651 | 0.000 | 6.396 | 0.000 | 12.990 | 0.812 | 41.115 | 18.946 |
| 15 | 36.858 | 0.000 | 0.000 | 0.121 | 6.363 | 0.000 | 19.306 | 20.621 | 2.400 | 18.192 | 19.664 | 25.803 |
| 16 | 40.586 | 0.000 | 0.000 | 2.367 | 0.884 | 0.000 | 0.000 | 3.442 | 10.140 | 12.419 | 5.151 | 5.022 |
| 17 | 12.055 | 0.000 | 2.797 | 0.941 | 0.000 | 9.293 | 7.457 | 85.925 | 37.111 | 2.165 | 2.000 | 0.000 |
| 18 | 2.555 | 0.000 | 4.963 | 2.184 | 2.946 | 26.653 | 3.331 | 0.941 | 17.490 | 2.105 | 7.453 | 0.030 |
| 19 | 6.163 | 0.000 | 1.955 | 0.000 | 15.408 | 0.000 | 0.000 | 0.000 | 7.800 | 11.186 | 27.026 | 5.323 |
| 20 | 15.483 | 7.650 | 1.895 | 0.758 | 2.416 | 0.000 | 0.825 | 0.000 | 10.890 | 0.241 | 2.727 | 10.315 |
| 21 | 24.171 | 14.522 | 0.000 | 0.000 | 3.683 | 13.476 | 0.000 | 0.000 | 14.550 | 0.000 | 24.057 | 44.088 |
| 22 | 2.465 | 4.727 | 0.000 | 0.243 | 5.421 | 27.161 | 0.000 | 0.000 | 3.690 | 11.426 | 0.000 | 35.607 |
| 23 | 10.131 | 27.210 | 11.188 | 0.000 | 0.884 | 1.464 | 0.000 | 1.265 | 6.510 | 48.321 | 1.545 | 2.466 |
| 24 | 7.907 | 32.061 | 0.000 | 0.000 | 28.636 | 48.824 | 0.000 | 57.803 | 65.611 | 32.475 | 4.969 | 5.594 |
| 25 | 18.609 | 2.612 | 2.075 | 2.184 | 3.476 | 5.080 | 1.710 | 0.471 | 16.230 | 20.898 | 3.818 | 1.053 |
| 26 | 24.351 | 11.972 | 5.955 | 1.790 | 1.296 | 0.657 | 0.472 | 0.000 | 14.640 | 33.287 | 24.754 | 9.954 |
| 27 | 36.527 | 22.110 | 2.286 | 14.472 | 1.090 | 0.299 | 0.000 | 12.178 | 37.591 | 8.149 | 28.723 | 1.594 |
| 28 | 1.563 | 5.349 | 0.000 | 7.524 | 0.000 | 20.587 | 0.000 | 0.735 | 38.671 | 0.842 | 1.969 | 7.037 |
| 29 | 10.222 | - | 0.060 | 1.729 | 0.000 | 1.106 | 0.000 | 0.000 | 21.090 | 16.358 | 23.511 | 17.804 |
| 30 | 2.405 | - | 1.023 | 45.384 | 0.000 | 10.067 | 0.000 | 36.976 | 8.010 | 1.443 | 0.061 | 30.013 |
| 31 | 4.720 | - | 0.060 | - | 0.000 | - | 0.765 | 3.118 | - | 3.187 | - | 18.706 |
| Total | 368.49 | 141.77 | 170.08 | 151.00 | 284.27 | 237.28 | 172.34 | 668.84 | 360.66 | 594.59 | 414.09 | 448.82 |
| Hari Hujan | 27.00 | 16.00 | 25.00 | 21.00 | 26.00 | 21.00 | 20.00 | 22.00 | 26.00 | 30.00 | 28.00 | 29.00 |
| Max | 40.586 | 32.061 | 41.805 | 45.692 | 80.221 | 48.824 | 52.613 | 110.664 | 65.611 | 76.376 | 47.144 | 67.365 |
| Avg | 11.89 | 5.06 | 5.49 | 5.03 | 9.17 | 7.91 | 5.56 | 21.58 | 12.02 | 19.18 | 13.80 | 14.48 |
Berdasarkan data hujan TRMM di Grid TRMM-1517, yang terletak di Desa Sinaka, Kecamatan Pagai Selatan, Kepulauan Mentawai, Provinsi Sumatera Barat, curah hujan tahunan yang terjadi pada tahun 1999 adalah sebesar 4,012.22 mm. Dengan jumlah hari hujan tahunan adalah 291 hari (79.73%). Curah hujan harian maksimum tahunan yang tercatat adalah sebesar 110.66 mm yang terjadi pada tanggal 6 Agustus 1999.
