| Tahun Data | : | 1999 |
| Nama Stasiun | : | TRMM-0539 |
| Lokasi Stasiun | : | Desa Isimu Selatan, Kecamatan Tibawa, Gorontalo, Provinsi Gorontalo |
| Longitude | : | 122.875000 |
| Latitude | : | 0.625000 |
| Tanggal | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 26.473 | 25.200 | 0.000 | 0.000 | 6.831 | 0.000 | 18.961 | 0.000 | 0.000 | 12.516 | 26.627 | 0.000 |
| 2 | 0.430 | 3.600 | 6.490 | 0.000 | 1.448 | 0.000 | 2.920 | 0.000 | 5.672 | 0.000 | 5.960 | 0.000 |
| 3 | 9.154 | 17.820 | 52.028 | 16.951 | 3.490 | 0.000 | 1.324 | 0.000 | 0.000 | 0.000 | 1.634 | 4.402 |
| 4 | 0.000 | 12.960 | 0.000 | 36.574 | 0.000 | 0.000 | 20.207 | 0.000 | 5.021 | 0.000 | 0.000 | 0.000 |
| 5 | 45.597 | 0.180 | 31.944 | 29.226 | 12.659 | 2.313 | 2.219 | 0.039 | 0.000 | 2.398 | 5.143 | 0.000 |
| 6 | 0.000 | 2.430 | 0.000 | 0.000 | 0.000 | 0.000 | 6.230 | 0.000 | 0.000 | 1.820 | 0.000 | 2.871 |
| 7 | 0.000 | 3.240 | 0.783 | 0.000 | 0.000 | 1.234 | 6.969 | 1.779 | 4.432 | 40.553 | 0.000 | 0.000 |
| 8 | 1.418 | 0.000 | 10.406 | 3.257 | 0.000 | 0.000 | 1.596 | 3.557 | 0.000 | 18.884 | 0.000 | 0.000 |
| 9 | 0.000 | 0.000 | 1.343 | 0.000 | 10.914 | 0.000 | 1.129 | 21.536 | 0.000 | 4.852 | 0.000 | 0.000 |
| 10 | 0.344 | 0.000 | 19.413 | 1.503 | 1.968 | 0.000 | 0.000 | 3.170 | 0.000 | 11.220 | 3.941 | 0.510 |
| 11 | 0.559 | 0.000 | 5.147 | 0.000 | 1.968 | 0.000 | 11.836 | 0.000 | 0.000 | 1.571 | 55.705 | 18.247 |
| 12 | 0.000 | 0.000 | 0.000 | 1.503 | 7.907 | 0.000 | 3.699 | 0.000 | 3.378 | 0.000 | 23.503 | 0.638 |
| 13 | 18.394 | 0.000 | 0.000 | 0.000 | 47.554 | 2.648 | 0.000 | 0.657 | 5.796 | 0.000 | 15.188 | 0.000 |
| 14 | 3.352 | 0.000 | 0.000 | 37.576 | 1.114 | 19.432 | 0.000 | 1.005 | 2.944 | 0.000 | 9.084 | 0.000 |
| 15 | 0.000 | 0.000 | 3.525 | 5.678 | 3.712 | 21.951 | 0.000 | 0.000 | 11.437 | 2.095 | 0.000 | 0.000 |
| 16 | 5.157 | 0.000 | 21.147 | 6.012 | 14.849 | 0.000 | 0.000 | 0.000 | 1.922 | 6.589 | 0.048 | 2.552 |
| 17 | 0.000 | 0.000 | 7.049 | 16.032 | 29.735 | 28.506 | 33.990 | 0.000 | 0.000 | 2.398 | 16.245 | 1.595 |
| 18 | 0.000 | 0.000 | 2.014 | 0.000 | 0.371 | 0.411 | 15.963 | 0.000 | 3.936 | 0.000 | 0.000 | 5.742 |
| 19 | 13.065 | 1.620 | 5.762 | 0.000 | 0.000 | 4.087 | 7.242 | 0.000 | 0.000 | 13.591 | 0.192 | 70.244 |
| 20 | 4.856 | 0.000 | 1.678 | 0.000 | 4.603 | 2.236 | 2.297 | 0.000 | 0.000 | 22.110 | 0.000 | 6.763 |
| 21 | 5.716 | 1.980 | 1.678 | 0.000 | 0.000 | 13.983 | 0.000 | 0.000 | 12.243 | 4.301 | 0.000 | 6.189 |
| 22 | 4.426 | 0.090 | 29.651 | 0.000 | 0.000 | 0.000 | 0.117 | 2.165 | 0.000 | 0.000 | 0.000 | 1.531 |
| 23 | 7.478 | 5.760 | 5.315 | 0.000 | 8.612 | 2.185 | 0.000 | 0.000 | 3.812 | 0.000 | 0.529 | 0.000 |
| 24 | 0.000 | 0.000 | 0.000 | 11.273 | 18.227 | 20.075 | 0.000 | 0.000 | 4.308 | 0.000 | 0.000 | 0.000 |
| 25 | 3.008 | 5.490 | 8.839 | 0.000 | 3.601 | 14.703 | 0.000 | 21.110 | 0.000 | 9.180 | 8.459 | 0.000 |
| 26 | 19.683 | 0.000 | 7.776 | 0.000 | 0.000 | 3.213 | 0.000 | 19.061 | 0.000 | 2.398 | 0.000 | 0.000 |
| 27 | 30.642 | 0.000 | 2.406 | 0.000 | 6.422 | 1.928 | 0.000 | 14.190 | 1.426 | 5.734 | 0.000 | 0.000 |
| 28 | 8.638 | 31.230 | 2.014 | 0.000 | 0.000 | 27.452 | 0.195 | 0.000 | 0.000 | 2.840 | 4.950 | 0.000 |
| 29 | 30.341 | - | 0.000 | 9.436 | 0.000 | 0.000 | 0.000 | 0.000 | 8.306 | 14.060 | 0.192 | 4.849 |
| 30 | 0.215 | - | 52.140 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 4.773 | 11.496 | 0.000 | 10.655 |
| 31 | 0.344 | - | 1.343 | - | 0.000 | - | 0.000 | 0.000 | - | 11.055 | - | 0.000 |
| Total | 239.29 | 111.60 | 279.89 | 175.02 | 185.99 | 166.36 | 136.89 | 88.27 | 79.41 | 201.66 | 177.40 | 136.79 |
| Hari Hujan | 22.00 | 13.00 | 23.00 | 12.00 | 19.00 | 16.00 | 17.00 | 11.00 | 15.00 | 21.00 | 16.00 | 14.00 |
| Max | 45.597 | 31.230 | 52.140 | 37.576 | 47.554 | 28.506 | 33.990 | 21.536 | 12.243 | 40.553 | 55.705 | 70.244 |
| Avg | 7.72 | 3.99 | 9.03 | 5.83 | 6.00 | 5.55 | 4.42 | 2.85 | 2.65 | 6.51 | 5.91 | 4.41 |
Berdasarkan data hujan TRMM di Grid TRMM-0539, yang terletak di Desa Isimu Selatan, Kecamatan Tibawa, Gorontalo, Provinsi Gorontalo, curah hujan tahunan yang terjadi pada tahun 1999 adalah sebesar 1,978.56 mm. Dengan jumlah hari hujan tahunan adalah 199 hari (54.52%). Curah hujan harian maksimum tahunan yang tercatat adalah sebesar 70.24 mm yang terjadi pada tanggal 19 Desember 1999.
