| Tahun Data | : | 2004 |
| Nama Stasiun | : | PANGKALAN KASAI |
| Lokasi Stasiun | : | Desa Kelurahan Pangkalan Kasai, Kecamatan Siberida, Indragiri Hulu, Provinsi Riau |
| Longitude | : | 102.390280 |
| Latitude | : | -0.591390 |
| Pengelola | : | BWS SUMATERA III |
| Tanggal | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | 1.10 | 20.20 | 10.10 | 40.20 | 0.00 | 0.00 | 25.50 | 5.20 | 59.10 | 0.00 | 0.00 | 0.00 |
| 2 | 0.00 | 0.00 | 0.00 | 35.10 | 0.00 | 6.70 | 17.60 | 0.00 | 0.00 | 14.90 | 8.60 | 0.00 |
| 3 | 0.00 | 45.50 | 56.70 | 0.00 | 40.70 | 11.10 | 0.00 | 0.00 | 0.00 | 0.00 | 5.20 | 64.10 |
| 4 | 0.00 | 30.20 | 0.00 | 7.90 | 20.20 | 0.00 | 10.10 | 0.00 | 0.00 | 0.00 | 0.00 | 30.90 |
| 5 | 2.70 | 16.20 | 0.00 | 12.80 | 0.00 | 0.00 | 17.10 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 6 | 0.00 | 1.20 | 18.10 | 0.00 | 0.00 | 4.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 7 | 0.00 | 0.00 | 0.00 | 6.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 34.50 | 6.10 | 1.70 |
| 8 | 15.20 | 0.00 | 8.80 | 0.00 | 0.00 | 0.00 | 20.30 | 0.00 | 0.00 | 0.00 | 10.70 | 0.00 |
| 9 | 1.70 | 28.30 | 26.20 | 0.00 | 0.00 | 3.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| 10 | 0.00 | 4.60 | 0.00 | 0.00 | 0.00 | 0.00 | 10.20 | 0.00 | 0.00 | 12.10 | 0.00 | 44.40 |
| 11 | 7.20 | 2.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.60 | 3.40 | 3.70 | 1.20 |
| 12 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 5.10 | 0.00 | 1.20 | 5.10 | 0.00 | 20.10 |
| 13 | 4.50 | 0.00 | 0.00 | 6.20 | 0.00 | 0.00 | 2.70 | 37.10 | 0.00 | 0.00 | 15.70 | 0.00 |
| 14 | 0.00 | 0.00 | 19.60 | 15.40 | 0.00 | 0.00 | 0.00 | 44.20 | 18.70 | 2.10 | 25.10 | 6.50 |
| 15 | 0.00 | 0.00 | 0.00 | 4.10 | 0.00 | 0.00 | 14.20 | 0.00 | 2.30 | 5.70 | 0.00 | 0.00 |
| 16 | 0.00 | 0.00 | 0.00 | 1.50 | 0.00 | 0.00 | 0.00 | 0.00 | 21.20 | 14.20 | 16.10 | 0.00 |
| 17 | 0.00 | 0.00 | 0.00 | 16.10 | 0.00 | 0.00 | 0.00 | 12.80 | 10.30 | 1.30 | 0.00 | 54.40 |
| 18 | 0.00 | 12.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 30.10 | 5.80 |
| 19 | 6.90 | 0.00 | 15.10 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 7.50 | 5.20 | 0.00 |
| 20 | 0.00 | 3.10 | 5.90 | 0.00 | 20.70 | 0.00 | 40.30 | 0.00 | 0.00 | 10.70 | 0.00 | 0.00 |
| 21 | 0.00 | 2.20 | 0.00 | 0.00 | 7.00 | 0.00 | 0.00 | 0.00 | 3.30 | 4.20 | 3.10 | 18.50 |
| 22 | 0.00 | 0.00 | 3.10 | 28.20 | 20.10 | 0.00 | 71.70 | 8.10 | 0.00 | 12.50 | 5.20 | 0.00 |
| 23 | 10.20 | 0.00 | 0.00 | 0.00 | 0.00 | 15.10 | 0.00 | 10.00 | 0.00 | 16.50 | 0.00 | 24.30 |
| 24 | 15.10 | 0.00 | 18.40 | 16.10 | 19.20 | 30.20 | 7.40 | 0.00 | 15.20 | 0.00 | 23.10 | 2.90 |
| 25 | 7.70 | 0.00 | 12.10 | 0.00 | 42.90 | 0.00 | 1.60 | 31.20 | 0.00 | 10.50 | 60.50 | 0.00 |
| 26 | 48.20 | 31.60 | 0.00 | 35.50 | 0.00 | 0.00 | 0.00 | 0.00 | 20.30 | 20.60 | 13.40 | 0.00 |
| 27 | 21.50 | 0.00 | 10.90 | 0.00 | 6.40 | 0.00 | 13.30 | 0.00 | 40.70 | 7.80 | 23.10 | 0.00 |
| 28 | 0.00 | 19.20 | 0.00 | 0.00 | 0.00 | 24.60 | 0.00 | 0.00 | 11.20 | 4.90 | 0.00 | 0.00 |
| 29 | 40.10 | 14.90 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 27.10 | 3.20 | 0.00 | 0.00 |
| 30 | 11.10 | - | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 17.10 | 4.20 | 0.00 |
| 31 | 0.00 | - | 19.90 | - | 0.00 | - | 0.00 | 25.10 | - | 6.40 | - | 4.10 |
| Total | 193.20 | 231.40 | 224.90 | 225.10 | 177.20 | 94.90 | 257.10 | 173.70 | 232.20 | 215.20 | 259.10 | 278.90 |
| Hari Hujan | 14.00 | 14.00 | 13.00 | 13.00 | 8.00 | 7.00 | 14.00 | 8.00 | 13.00 | 21.00 | 17.00 | 13.00 |
| Max | 48.20 | 45.50 | 56.70 | 40.20 | 42.90 | 30.20 | 71.70 | 44.20 | 59.10 | 34.50 | 60.50 | 64.10 |
| Avg | 6.23 | 7.98 | 7.25 | 7.50 | 5.72 | 3.16 | 8.29 | 5.60 | 7.74 | 6.94 | 8.64 | 9.00 |
Berdasarkan data tercatat di Stasiun PANGKALAN KASAI, yang terletak di Desa Kelurahan Pangkalan Kasai, Kecamatan Siberida, Indragiri Hulu, Provinsi Riau, curah hujan tahunan yang terjadi pada tahun 2004 adalah sebesar 2,562.90 mm. Dengan jumlah hari hujan tahunan adalah 155 hari (42.47%). Curah hujan harian maksimum tahunan yang tercatat adalah sebesar 71.70 mm yang terjadi pada tanggal 22 Juli 2004.