| Tahun Data | : | 1999 |
| Nama Stasiun | : | TRMM-0552 |
| Lokasi Stasiun | : | Desa Simpang Tonang Utara (Persiapan), Kecamatan Duo Koto, Pasaman, Provinsi Sumatera Barat |
| Longitude | : | 99.875000 |
| Latitude | : | 0.375000 |
| Tanggal | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 41.972 | 0.000 | 12.290 | 0.000 | 22.592 | 0.000 | 1.365 | 0.000 | 3.983 | 8.142 | 17.833 | 24.917 |
| 2 | 16.583 | 18.069 | 0.000 | 0.000 | 0.604 | 0.000 | 0.981 | 0.000 | 2.858 | 32.859 | 0.000 | 75.574 |
| 3 | 12.898 | 5.779 | 38.379 | 2.443 | 19.571 | 0.000 | 12.603 | 17.985 | 24.939 | 2.779 | 0.000 | 20.272 |
| 4 | 16.951 | 0.000 | 6.035 | 16.318 | 0.994 | 0.000 | 40.028 | 0.000 | 28.923 | 14.382 | 0.000 | 19.692 |
| 5 | 0.000 | 6.986 | 10.844 | 10.166 | 8.479 | 0.000 | 11.964 | 6.632 | 2.223 | 2.633 | 4.606 | 47.802 |
| 6 | 2.358 | 11.558 | 0.000 | 34.163 | 1.287 | 0.000 | 19.108 | 10.760 | 0.000 | 12.237 | 0.000 | 0.145 |
| 7 | 11.276 | 22.166 | 0.000 | 4.538 | 3.275 | 0.000 | 0.000 | 5.863 | 1.126 | 9.702 | 0.000 | 77.026 |
| 8 | 2.985 | 8.778 | 23.732 | 0.000 | 0.000 | 39.043 | 2.069 | 0.000 | 31.347 | 37.296 | 0.000 | 11.854 |
| 9 | 2.395 | 27.689 | 4.306 | 0.000 | 4.561 | 1.125 | 8.061 | 0.000 | 22.515 | 12.383 | 0.000 | 0.000 |
| 10 | 4.864 | 0.000 | 6.538 | 2.051 | 2.807 | 1.711 | 5.076 | 2.240 | 9.410 | 23.499 | 14.740 | 1.693 |
| 11 | 42.267 | 0.000 | 1.760 | 0.000 | 46.568 | 26.941 | 0.000 | 20.290 | 2.771 | 4.046 | 45.042 | 0.000 |
| 12 | 0.000 | 41.112 | 16.219 | 0.000 | 0.097 | 2.274 | 0.235 | 9.025 | 0.029 | 15.454 | 9.870 | 0.000 |
| 13 | 105.834 | 46.818 | 11.221 | 0.000 | 0.507 | 0.000 | 0.512 | 1.515 | 0.000 | 14.138 | 0.000 | 2.613 |
| 14 | 5.749 | 3.036 | 8.393 | 0.000 | 0.780 | 1.320 | 5.950 | 13.198 | 5.196 | 95.555 | 1.711 | 8.854 |
| 15 | 21.299 | 0.000 | 3.929 | 0.960 | 5.926 | 1.320 | 1.557 | 0.000 | 0.722 | 6.240 | 1.974 | 0.000 |
| 16 | 5.749 | 6.876 | 4.872 | 2.443 | 5.809 | 2.445 | 0.000 | 13.285 | 24.247 | 29.300 | 20.169 | 1.693 |
| 17 | 5.822 | 6.840 | 20.526 | 25.873 | 2.515 | 0.709 | 16.634 | 0.285 | 65.697 | 0.000 | 7.370 | 22.788 |
| 18 | 2.506 | 2.890 | 7.701 | 0.000 | 2.768 | 0.000 | 0.000 | 0.000 | 0.000 | 47.144 | 6.613 | 17.708 |
| 19 | 6.780 | 4.755 | 9.461 | 0.000 | 7.368 | 0.000 | 0.000 | 20.422 | 23.554 | 23.011 | 15.957 | 0.000 |
| 20 | 2.358 | 0.000 | 2.420 | 0.000 | 0.000 | 0.000 | 0.000 | 43.040 | 18.878 | 19.745 | 20.333 | 0.387 |
| 21 | 6.854 | 0.000 | 0.503 | 0.175 | 4.581 | 20.291 | 0.000 | 11.638 | 28.952 | 4.144 | 8.489 | 0.000 |
| 22 | 0.000 | 0.000 | 16.031 | 0.000 | 3.743 | 19.949 | 0.000 | 16.821 | 17.608 | 10.335 | 3.685 | 6.193 |
| 23 | 11.276 | 0.000 | 6.129 | 0.000 | 1.988 | 0.000 | 0.000 | 9.662 | 0.000 | 3.656 | 12.272 | 3.387 |
| 24 | 10.760 | 11.741 | 0.849 | 0.349 | 11.013 | 9.094 | 7.571 | 5.644 | 0.000 | 4.436 | 23.558 | 0.000 |
| 25 | 1.843 | 64.851 | 0.000 | 0.000 | 0.409 | 8.630 | 0.000 | 10.255 | 1.588 | 1.024 | 49.451 | 0.000 |
| 26 | 4.680 | 21.763 | 37.091 | 9.643 | 0.000 | 1.149 | 2.538 | 0.000 | 13.567 | 0.731 | 0.000 | 0.000 |
| 27 | 0.000 | 4.755 | 4.338 | 3.621 | 0.000 | 0.000 | 0.000 | 1.493 | 18.589 | 9.555 | 15.299 | 0.000 |
| 28 | 0.000 | 0.000 | 6.569 | 6.632 | 0.000 | 9.803 | 0.000 | 32.851 | 0.000 | 1.511 | 16.681 | 0.000 |
| 29 | 0.000 | - | 4.306 | 13.526 | 0.000 | 3.349 | 0.000 | 0.000 | 41.421 | 44.462 | 2.501 | 0.000 |
| 30 | 1.621 | - | 7.198 | 22.557 | 0.000 | 0.000 | 0.853 | 0.000 | 2.569 | 6.289 | 94.737 | 0.000 |
| 31 | 0.000 | - | 2.955 | - | 0.000 | - | 0.000 | 5.775 | - | 36.564 | - | 0.000 |
| Total | 347.68 | 316.46 | 274.60 | 155.46 | 158.24 | 149.15 | 137.11 | 258.68 | 392.71 | 533.25 | 392.89 | 342.60 |
| Hari Hujan | 24.00 | 18.00 | 27.00 | 16.00 | 23.00 | 16.00 | 17.00 | 21.00 | 24.00 | 30.00 | 21.00 | 17.00 |
| Max | 105.834 | 64.851 | 38.379 | 34.163 | 46.568 | 39.043 | 40.028 | 43.040 | 65.697 | 95.555 | 94.737 | 77.026 |
| Avg | 11.22 | 11.30 | 8.86 | 5.18 | 5.10 | 4.97 | 4.42 | 8.34 | 13.09 | 17.20 | 13.10 | 11.05 |
Berdasarkan data hujan TRMM di Grid TRMM-0552, yang terletak di Desa Simpang Tonang Utara (Persiapan), Kecamatan Duo Koto, Pasaman, Provinsi Sumatera Barat, curah hujan tahunan yang terjadi pada tahun 1999 adalah sebesar 3,458.83 mm. Dengan jumlah hari hujan tahunan adalah 254 hari (69.59%). Curah hujan harian maksimum tahunan yang tercatat adalah sebesar 105.83 mm yang terjadi pada tanggal 13 Januari 1999.
