| Tahun Data | : | 1999 |
| Nama Stasiun | : | TRMM-2230 |
| Lokasi Stasiun | : | Desa Ngancar, Kecamatan Pitu, Ngawi, Provinsi Jawa Timur |
| Longitude | : | 111.375000 |
| Latitude | : | -7.375000 |
| Tanggal | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 0.000 | 0.737 | 13.112 | 0.000 | 5.264 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 42.183 | 1.943 |
| 2 | 0.543 | 48.678 | 16.370 | 2.365 | 0.806 | 0.000 | 0.282 | 0.000 | 0.000 | 0.000 | 13.509 | 7.350 |
| 3 | 0.318 | 17.275 | 4.353 | 25.621 | 6.633 | 7.408 | 0.000 | 0.000 | 0.000 | 7.867 | 33.921 | 14.573 |
| 4 | 3.819 | 3.194 | 17.830 | 85.169 | 11.431 | 0.000 | 19.776 | 0.000 | 0.000 | 1.223 | 0.223 | 6.885 |
| 5 | 1.572 | 3.858 | 16.474 | 20.032 | 0.000 | 0.000 | 35.258 | 0.000 | 0.000 | 0.000 | 5.787 | 8.575 |
| 6 | 0.000 | 10.149 | 34.043 | 12.625 | 0.000 | 0.222 | 0.000 | 0.000 | 0.000 | 0.000 | 5.098 | 4.752 |
| 7 | 14.883 | 7.347 | 26.197 | 4.749 | 0.350 | 0.333 | 0.000 | 0.000 | 0.000 | 0.000 | 0.130 | 20.804 |
| 8 | 5.728 | 1.917 | 9.593 | 0.117 | 4.817 | 0.000 | 0.000 | 0.124 | 0.000 | 0.000 | 20.896 | 11.173 |
| 9 | 6.983 | 2.826 | 5.239 | 2.287 | 0.049 | 0.000 | 0.000 | 0.222 | 0.000 | 19.080 | 1.470 | 8.850 |
| 10 | 9.884 | 0.467 | 10.687 | 9.791 | 0.000 | 0.000 | 0.000 | 13.192 | 0.000 | 0.000 | 56.548 | 1.394 |
| 11 | 1.161 | 0.000 | 0.000 | 80.224 | 0.971 | 0.000 | 0.000 | 6.646 | 0.000 | 3.022 | 25.771 | 5.618 |
| 12 | 38.676 | 0.713 | 11.678 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 2.326 | 10.560 |
| 13 | 4.811 | 0.147 | 22.365 | 2.971 | 0.670 | 0.000 | 0.000 | 0.000 | 0.000 | 3.092 | 0.149 | 2.112 |
| 14 | 3.445 | 0.000 | 7.351 | 17.276 | 0.136 | 0.000 | 0.000 | 0.000 | 0.000 | 72.722 | 0.279 | 13.517 |
| 15 | 19.881 | 11.967 | 31.750 | 10.925 | 1.175 | 0.000 | 0.000 | 0.000 | 0.000 | 14.166 | 18.421 | 0.000 |
| 16 | 7.956 | 43.150 | 37.536 | 21.400 | 2.914 | 0.000 | 0.031 | 0.000 | 13.500 | 0.646 | 4.317 | 3.041 |
| 17 | 11.195 | 13.097 | 12.564 | 0.020 | 0.000 | 0.000 | 0.125 | 0.000 | 0.000 | 18.688 | 11.965 | 0.000 |
| 18 | 44.966 | 22.410 | 0.000 | 0.274 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.415 | 15.872 | 4.710 |
| 19 | 8.330 | 13.220 | 18.820 | 0.000 | 0.835 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 16.133 | 6.421 |
| 20 | 0.449 | 12.729 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 1.530 | 14.166 | 16.151 | 19.621 |
| 21 | 13.348 | 3.833 | 13.398 | 1.485 | 0.000 | 2.963 | 0.000 | 0.124 | 0.000 | 5.952 | 5.917 | 19.410 |
| 22 | 8.424 | 0.000 | 0.000 | 0.000 | 0.000 | 21.075 | 0.000 | 0.222 | 0.000 | 0.000 | 5.378 | 30.921 |
| 23 | 6.964 | 5.062 | 20.254 | 0.000 | 0.000 | 1.667 | 0.000 | 0.420 | 0.000 | 0.000 | 2.512 | 2.049 |
| 24 | 29.316 | 1.794 | 20.619 | 0.000 | 0.000 | 0.000 | 11.063 | 0.000 | 0.000 | 2.976 | 7.908 | 2.492 |
| 25 | 17.953 | 74.357 | 7.533 | 0.000 | 0.000 | 0.000 | 0.000 | 1.482 | 1.440 | 1.753 | 15.277 | 6.315 |
| 26 | 11.663 | 6.733 | 1.017 | 0.000 | 0.000 | 7.704 | 0.000 | 4.076 | 0.000 | 0.000 | 30.888 | 12.736 |
| 27 | 11.943 | 1.573 | 8.889 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.900 | 0.000 | 69.368 | 0.000 |
| 28 | 18.739 | 0.025 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 10.152 | 0.000 | 0.803 |
| 29 | 2.396 | - | 25.806 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 8.352 | 0.000 | 12.757 |
| 30 | 3.070 | - | 26.145 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 0.000 | 21.226 | 0.000 | 6.188 |
| 31 | 1.610 | - | 0.000 | - | 0.000 | - | 0.000 | 0.000 | - | 7.937 | - | 8.871 |
| Total | 310.03 | 307.26 | 419.62 | 297.33 | 36.05 | 41.37 | 66.54 | 26.51 | 17.37 | 213.44 | 428.40 | 254.44 |
| Hari Hujan | 29.00 | 25.00 | 25.00 | 17.00 | 13.00 | 7.00 | 6.00 | 9.00 | 4.00 | 18.00 | 27.00 | 28.00 |
| Max | 44.966 | 74.357 | 37.536 | 85.169 | 11.431 | 21.075 | 35.258 | 13.192 | 13.500 | 72.722 | 69.368 | 30.921 |
| Avg | 10.00 | 10.97 | 13.54 | 9.91 | 1.16 | 1.38 | 2.15 | 0.86 | 0.58 | 6.89 | 14.28 | 8.21 |
Berdasarkan data hujan TRMM di Grid TRMM-2230, yang terletak di Desa Ngancar, Kecamatan Pitu, Ngawi, Provinsi Jawa Timur, curah hujan tahunan yang terjadi pada tahun 1999 adalah sebesar 2,418.35 mm. Dengan jumlah hari hujan tahunan adalah 208 hari (56.99%). Curah hujan harian maksimum tahunan yang tercatat adalah sebesar 85.17 mm yang terjadi pada tanggal 4 April 1999.
