Curah Hujan Bulanan
Stasiun PANGKALAN KASAI, Indragiri Hulu
| 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 |
| Tahun | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des | Jumlah |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1984 | 266.60 | 341.50 | 334.10 | 206.40 | 197.10 | 307.90 | 118.40 | 125.90 | 371.00 | 225.00 | 361.60 | 315.80 | 3,171.30 |
| 1985 | 279.20 | 203.90 | 313.50 | 304.00 | 156.30 | 29.30 | 121.90 | 31.50 | 217.80 | 396.80 | 287.30 | 380.30 | 2,721.80 |
| 1986 | 703.00 | 134.20 | 273.50 | 290.30 | 257.80 | 276.60 | 114.70 | 45.90 | 183.20 | 482.60 | 286.10 | 456.90 | 3,504.80 |
| 1987 | 206.60 | 51.90 | 115.80 | 202.50 | 139.70 | 166.10 | 68.60 | 46.10 | 110.40 | 219.00 | 223.40 | 226.40 | 1,776.50 |
| 1988 | 193.80 | 193.90 | 432.70 | 338.10 | 196.00 | 63.10 | 116.90 | 173.40 | 148.60 | 103.40 | 272.40 | 217.50 | 2,449.80 |
| 1989 | 292.70 | 101.80 | 306.20 | 198.00 | 252.10 | 120.00 | 127.80 | 335.70 | 343.90 | 312.50 | 662.80 | 386.30 | 3,439.80 |
| 1990 | 196.70 | 225.40 | 275.10 | 298.60 | 260.30 | 146.60 | 273.10 | 135.20 | 185.20 | 379.90 | 339.50 | 296.80 | 3,012.40 |
| 1991 | 302.80 | 74.00 | 203.80 | 332.50 | 314.30 | 107.40 | 85.70 | 49.60 | 70.60 | 3.70 | 450.20 | 511.90 | 2,506.50 |
| 1992 | 177.90 | 106.50 | 238.20 | 202.60 | 175.80 | 170.20 | 196.60 | 213.40 | 194.60 | 315.40 | 546.60 | 219.10 | 2,756.90 |
| 1993 | 290.00 | 59.60 | 265.30 | 132.90 | 197.80 | 19.50 | 200.30 | 83.10 | 71.20 | 416.80 | 581.10 | 310.80 | 2,628.40 |
| 1994 | 99.70 | 85.20 | 471.30 | 199.80 | 242.40 | 248.80 | 4.70 | 59.80 | 12.30 | 86.00 | 323.70 | 480.50 | 2,314.20 |
| 1995 | 823.60 | 463.30 | 721.90 | 273.10 | 328.60 | 67.60 | 74.10 | 251.40 | 89.20 | 760.70 | 396.20 | 89.80 | 4,339.50 |
| 1996 | 56.80 | 253.70 | 503.50 | 800.00 | 189.60 | 140.60 | 24.90 | 119.50 | 224.20 | 162.10 | 237.20 | 29.40 | 2,741.50 |
| 1997 | 56.00 | 71.90 | 306.40 | 349.40 | 217.00 | 124.60 | 87.30 | 141.80 | 3.00 | 85.10 | 185.30 | 247.40 | 1,875.20 |
| 1998 | 122.70 | 145.50 | 224.70 | 185.20 | 190.10 | 188.90 | 160.60 | 422.00 | 299.30 | 129.40 | 90.10 | 463.70 | 2,622.20 |
| 1999 | 340.50 | 53.90 | 383.30 | 181.40 | 156.20 | 75.30 | 111.20 | 211.20 | 117.40 | 387.70 | 296.10 | 190.00 | 2,504.20 |
| 2000 | 263.50 | 187.40 | 162.90 | 186.30 | 151.20 | 180.30 | 46.20 | 245.00 | 224.90 | 188.50 | 284.10 | 315.60 | 2,435.90 |
| 2001 | 215.80 | 268.00 | 144.30 | 180.60 | 242.60 | 140.60 | 110.50 | 289.70 | 186.80 | 372.60 | 485.00 | 276.70 | 2,913.20 |
| 2002 | 429.60 | 15.50 | 293.50 | 297.10 | 201.90 | 99.20 | 136.20 | 27.60 | 90.70 | 153.90 | 644.40 | 267.40 | 2,657.00 |
| 2003 | 218.40 | 127.20 | 200.40 | 317.10 | 86.00 | 36.40 | 83.10 | 51.70 | 111.30 | 348.00 | 244.30 | 164.20 | 1,988.10 |
| 2004 | 193.20 | 231.40 | 224.90 | 225.10 | 177.20 | 94.90 | 257.10 | 173.70 | 232.20 | 215.20 | 259.10 | 278.90 | 2,562.90 |
| 2005 | 141.60 | 116.70 | 214.10 | 163.80 | 223.40 | 141.20 | 196.40 | 189.40 | 303.60 | 268.40 | 198.00 | 160.90 | 2,317.50 |
| 2006 | 215.10 | 106.30 | 324.00 | 562.10 | 136.60 | 99.70 | 113.80 | 137.70 | 88.20 | 96.30 | 335.50 | 228.10 | 2,443.40 |
| 2007 | 151.80 | 158.00 | 154.30 | 329.10 | 382.20 | 108.30 | 168.20 | 83.20 | 216.30 | 151.70 | 325.80 | 185.40 | 2,414.30 |
| 2008 | 179.70 | 125.40 | 526.80 | 386.50 | 58.90 | 73.80 | 96.80 | 137.40 | 216.40 | 214.50 | 222.70 | 169.80 | 2,408.70 |
| 2009 | 150.20 | 83.40 | 307.80 | 100.60 | 101.80 | 211.70 | 130.50 | 62.30 | 91.90 | 306.80 | 279.00 | 378.70 | 2,204.70 |
| 2010 | 142.40 | 136.20 | 219.30 | 223.40 | 100.30 | 68.50 | 285.40 | 224.20 | 286.60 | 154.50 | 241.10 | 124.40 | 2,206.30 |
| 2011 | 319.30 | 100.30 | 130.30 | 234.80 | 183.10 | 216.40 | 114.50 | 116.50 | 117.20 | 244.90 | 285.50 | 151.50 | 2,214.30 |
| 2012 | 104.70 | 158.40 | 150.00 | 352.30 | 150.50 | 37.40 | 114.70 | 45.30 | 197.30 | 227.30 | 426.70 | 231.60 | 2,196.20 |
| 2013 | 66.30 | 183.80 | 148.00 | 193.10 | 210.60 | 33.40 | 45.10 | 41.50 | 163.00 | 164.30 | 324.50 | 138.90 | 1,712.50 |
| 2014 | 106.00 | 16.00 | 284.60 | 103.20 | 175.00 | 25.70 | 75.20 | 106.20 | 125.30 | 50.20 | 284.40 | 198.70 | 1,550.50 |
| 2015 | 140.90 | 82.40 | 249.50 | 214.00 | 288.70 | 18.50 | 20.90 | 11.30 | 34.10 | 27.40 | 315.70 | 235.60 | 1,639.00 |
| 2016 | 208.70 | 57.70 | 233.80 | 264.60 | 162.60 | 71.70 | 164.70 | 70.70 | 49.20 | 142.50 | 254.00 | 60.20 | 1,740.40 |
| 2017 | 131.00 | 298.40 | 183.00 | 249.70 | 194.00 | 144.00 | 187.00 | 178.00 | 279.00 | 97.60 | 286.00 | 195.00 | 2,422.70 |
| 2018 | 105.00 | 143.00 | 128.60 | 208.00 | 206.00 | 169.00 | 121.00 | 113.70 | 73.00 | 244.10 | 426.50 | 219.00 | 2,156.90 |
| 2019 | 437.00 | 318.00 | 443.20 | 380.80 | 198.00 | 241.00 | 88.50 | 59.00 | 23.00 | 150.00 | 212.00 | 223.00 | 2,773.50 |
| 2020 | 180.00 | 165.00 | 199.00 | 266.00 | 255.00 | 70.00 | 93.00 | 135.00 | 260.00 | 274.00 | 323.00 | 205.00 | 2,425.00 |
| 2021 | 217.50 | 80.50 | 241.00 | 448.30 | 220.70 | 256.00 | 90.50 | 365.50 | 217.90 | 182.80 | 156.90 | 144.90 | 2,622.50 |
| Rata-rata | 229.64 | 150.66 | 277.17 | 273.19 | 199.41 | 126.06 | 121.74 | 139.74 | 163.94 | 230.04 | 325.10 | 246.74 | 2,483.43 |
Berdasarkan rata-rata curah hujan bulanan di Stasiun PANGKALAN KASAI Desa Kelurahan Pangkalan Kasai, Kecamatan Siberida, Indragiri Hulu, Provinsi Riau, Musim Basah terjadi mulai bulan Desember. Musim basah ditandai dengan curah hujan tinggi, tanah yang lebih lembab, dan seringnya terjadi hujan lebat. Sedangkan Musim Kering terjadi mulai bulan November. Musim kering ditandai dengan curah hujan rendah, tanah lebih kering, dan kondisi cuaca yang umumnya lebih panas.
Besar curah hujan tahunan rata-rata adalah sebesar 2483.43 mm/tahun. Curah hujan bulanan rata-rata maksimum adalah sebesar 325.10 mm/bulan. Berdasakan data curah hujan tahunan, dengan menggunakan metode regresi linear sederhana, diperoleh kesimpulan bahwa Curah hujan menunjukkan tren menurun dengan kemiringan sebesar -23.5896
