| Tahun Data | : | 1999 |
| Nama Stasiun | : | TRMM-1048 |
| Lokasi Stasiun | : | Desa Madobag, Kecamatan Siberut Selatan, Kepulauan Mentawai, Provinsi Sumatera Barat |
| Longitude | : | 99.125000 |
| Latitude | : | -1.625000 |
| Tanggal | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 18.164 | 1.521 | 7.233 | 0.000 | 68.987 | 0.000 | 1.161 | 0.000 | 2.268 | 65.361 | 1.064 | 0.000 |
| 2 | 16.256 | 22.081 | 8.281 | 0.000 | 2.731 | 0.000 | 0.000 | 0.000 | 8.757 | 44.725 | 1.064 | 46.371 |
| 3 | 1.363 | 33.462 | 38.052 | 0.000 | 74.701 | 0.000 | 28.260 | 0.000 | 22.899 | 0.000 | 0.000 | 3.461 |
| 4 | 0.750 | 4.196 | 3.424 | 0.000 | 38.666 | 29.789 | 21.538 | 5.450 | 16.505 | 16.866 | 5.625 | 2.557 |
| 5 | 0.000 | 0.000 | 0.314 | 12.035 | 2.456 | 6.254 | 3.906 | 71.685 | 0.000 | 10.874 | 13.327 | 44.798 |
| 6 | 0.000 | 0.000 | 5.661 | 10.999 | 0.000 | 0.000 | 9.221 | 5.748 | 0.220 | 62.702 | 44.034 | 15.300 |
| 7 | 0.000 | 0.000 | 0.000 | 17.384 | 40.821 | 0.000 | 4.540 | 16.728 | 0.094 | 0.000 | 47.378 | 5.664 |
| 8 | 0.000 | 4.143 | 1.013 | 1.605 | 7.668 | 0.129 | 10.417 | 0.000 | 13.639 | 46.709 | 17.938 | 1.416 |
| 9 | 2.760 | 4.301 | 17.401 | 0.802 | 13.306 | 15.991 | 7.179 | 30.203 | 6.993 | 7.818 | 0.000 | 0.000 |
| 10 | 0.102 | 0.000 | 27.080 | 72.076 | 17.190 | 76.471 | 25.409 | 14.234 | 1.449 | 9.207 | 0.000 | 8.063 |
| 11 | 0.545 | 4.301 | 31.099 | 0.000 | 4.210 | 2.063 | 8.235 | 0.813 | 29.041 | 6.985 | 9.729 | 25.408 |
| 12 | 4.601 | 0.000 | 3.879 | 0.368 | 0.000 | 0.742 | 0.669 | 0.786 | 0.000 | 0.000 | 52.395 | 0.000 |
| 13 | 1.670 | 2.622 | 0.000 | 2.140 | 7.117 | 0.000 | 0.000 | 11.550 | 5.922 | 2.183 | 20.776 | 6.372 |
| 14 | 0.000 | 0.000 | 26.696 | 11.701 | 17.667 | 0.000 | 0.000 | 0.434 | 3.496 | 0.000 | 20.826 | 0.000 |
| 15 | 0.000 | 0.000 | 0.000 | 0.000 | 3.684 | 0.000 | 8.270 | 0.108 | 0.000 | 8.691 | 16.975 | 1.416 |
| 16 | 147.595 | 0.000 | 0.000 | 0.000 | 4.110 | 0.000 | 0.000 | 5.585 | 3.402 | 68.179 | 12.719 | 2.714 |
| 17 | 10.530 | 0.000 | 0.000 | 9.962 | 21.977 | 3.933 | 8.552 | 8.052 | 49.263 | 18.096 | 0.000 | 31.465 |
| 18 | 2.965 | 0.000 | 6.569 | 1.705 | 1.980 | 29.176 | 0.000 | 0.000 | 8.883 | 1.151 | 15.607 | 32.409 |
| 19 | 5.316 | 20.927 | 10.413 | 0.000 | 3.483 | 0.000 | 0.000 | 0.678 | 1.197 | 16.390 | 20.522 | 2.045 |
| 20 | 50.028 | 24.074 | 0.000 | 0.000 | 0.226 | 0.000 | 0.000 | 15.590 | 4.158 | 9.763 | 0.000 | 0.000 |
| 21 | 0.409 | 0.000 | 0.000 | 0.000 | 0.551 | 0.967 | 0.000 | 27.628 | 1.890 | 0.000 | 11.553 | 0.000 |
| 22 | 14.279 | 3.199 | 0.000 | 0.000 | 2.456 | 25.920 | 0.000 | 10.113 | 4.158 | 16.350 | 0.000 | 20.177 |
| 23 | 1.602 | 12.116 | 8.631 | 0.000 | 23.756 | 0.000 | 0.000 | 8.107 | 2.362 | 13.969 | 2.787 | 8.024 |
| 24 | 32.409 | 24.808 | 6.255 | 0.000 | 10.074 | 19.343 | 5.983 | 17.515 | 45.200 | 10.477 | 18.546 | 0.000 |
| 25 | 24.026 | 37.396 | 1.852 | 0.000 | 5.538 | 36.849 | 0.633 | 5.666 | 30.711 | 17.303 | 0.152 | 2.045 |
| 26 | 24.946 | 35.875 | 9.609 | 0.000 | 0.000 | 15.926 | 6.370 | 1.844 | 20.159 | 16.866 | 0.000 | 0.315 |
| 27 | 5.419 | 0.000 | 1.852 | 0.201 | 0.000 | 0.000 | 0.000 | 8.188 | 107.630 | 7.024 | 47.125 | 23.363 |
| 28 | 3.987 | 6.923 | 0.000 | 10.129 | 0.000 | 13.444 | 0.000 | 3.660 | 37.105 | 0.000 | 7.905 | 13.569 |
| 29 | 0.000 | - | 0.000 | 23.502 | 0.000 | 1.805 | 1.724 | 0.000 | 12.662 | 16.152 | 4.662 | 0.000 |
| 30 | 10.428 | - | 0.594 | 0.000 | 0.000 | 0.000 | 0.000 | 3.009 | 7.969 | 6.072 | 14.652 | 55.378 |
| 31 | 1.670 | - | 0.000 | - | 0.000 | - | 5.103 | 0.000 | - | 0.000 | - | 15.146 |
| Total | 381.82 | 241.95 | 215.91 | 174.61 | 373.36 | 278.80 | 157.17 | 273.37 | 448.03 | 499.91 | 407.36 | 367.48 |
| Hari Hujan | 24.00 | 16.00 | 20.00 | 14.00 | 23.00 | 16.00 | 18.00 | 24.00 | 27.00 | 24.00 | 23.00 | 23.00 |
| Max | 147.595 | 37.396 | 38.052 | 72.076 | 74.701 | 76.471 | 28.260 | 71.685 | 107.630 | 68.179 | 52.395 | 55.378 |
| Avg | 12.32 | 8.64 | 6.96 | 5.82 | 12.04 | 9.29 | 5.07 | 8.82 | 14.93 | 16.13 | 13.58 | 11.85 |
Berdasarkan data hujan TRMM di Grid TRMM-1048, yang terletak di Desa Madobag, Kecamatan Siberut Selatan, Kepulauan Mentawai, Provinsi Sumatera Barat, curah hujan tahunan yang terjadi pada tahun 1999 adalah sebesar 3,819.77 mm. Dengan jumlah hari hujan tahunan adalah 252 hari (69.04%). Curah hujan harian maksimum tahunan yang tercatat adalah sebesar 147.60 mm yang terjadi pada tanggal 16 Januari 1999.
