Curah Hujan Bulanan
Stasiun Waduk Nawangan, KAB. WONOGIRI
| Nama Stasiun | : | Waduk Nawangan |
| Lokasi Stasiun | : | Desa Platarejo, Kecamatan Giriwoyo, KAB. WONOGIRI, Provinsi JAWA TENGAH |
| Longitude | : | 110.897683 |
| Latitude | : | -8.041533 |
| Pengelola | : | BBWS Bengawan Solo |
| Tahun | Jan | Feb | Mar | Apr | Mei | Jun | Jul | Agu | Sep | Okt | Nov | Des | Jumlah |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1975 | 275.16 | 431.63 | 438.85 | 211.78 | 185.32 | 2.18 | 2.41 | 0.80 | 201.38 | 366.67 | 125.96 | 280.82 | 2,522.96 |
| 1976 | 388.10 | 144.40 | 391.40 | 56.50 | 41.90 | 4.50 | 6.50 | 14.15 | 7.07 | 51.50 | 75.50 | 203.77 | 1,385.29 |
| 1977 | 308.25 | 331.50 | 259.00 | 132.50 | 5.00 | 97.50 | 0.00 | 0.00 | 0.00 | 0.00 | 119.00 | 175.50 | 1,428.25 |
| 1978 | 330.80 | 114.00 | 144.20 | 85.00 | 165.00 | 377.50 | 65.50 | 92.50 | 68.50 | 33.50 | 192.00 | 251.50 | 1,920.00 |
| 1979 | 298.00 | 166.00 | 371.00 | 257.00 | 232.00 | 64.00 | 0.00 | 0.00 | 3.00 | 47.00 | 7.00 | 259.00 | 1,704.00 |
| 1980 | 311.00 | 248.00 | 102.00 | 284.00 | 59.00 | 48.00 | 0.00 | 21.00 | 2.00 | 38.00 | 294.00 | 219.00 | 1,626.00 |
| 1981 | 374.00 | 231.00 | 261.00 | 86.00 | 67.00 | 144.00 | 103.00 | 39.00 | 64.00 | 87.00 | 269.00 | 242.00 | 1,967.00 |
| 1982 | 470.00 | 318.00 | 97.00 | 125.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 7.00 | 236.00 | 1,253.00 |
| 1983 | 143.00 | 153.00 | 150.00 | 278.00 | 288.00 | 24.00 | 0.00 | 0.00 | 0.00 | 81.00 | 255.00 | 134.00 | 1,506.00 |
| 1984 | 422.00 | 390.00 | 181.00 | 165.00 | 29.00 | 3.00 | 10.00 | 15.00 | 133.00 | 38.00 | 139.00 | 503.00 | 2,028.00 |
| 1985 | 106.00 | 303.00 | 389.00 | 178.00 | 25.00 | 55.00 | 8.00 | 4.00 | 0.00 | 86.00 | 175.00 | 77.00 | 1,406.00 |
| 1986 | 332.00 | 127.00 | 311.00 | 130.00 | 12.00 | 78.00 | 0.00 | 0.00 | 30.00 | 0.00 | 222.00 | 159.00 | 1,401.00 |
| 1987 | 632.00 | 241.00 | 111.00 | 58.00 | 12.00 | 92.00 | 51.86 | 0.00 | 0.00 | 0.00 | 56.00 | 357.00 | 1,610.86 |
| 1988 | 300.00 | 306.00 | 343.00 | 47.00 | 185.00 | 23.00 | 0.00 | 26.00 | 15.10 | 172.00 | 271.00 | 205.00 | 1,893.10 |
| 1989 | 242.00 | 410.00 | 192.00 | 174.00 | 127.00 | 14.00 | 91.00 | 5.01 | 18.00 | 12.00 | 88.00 | 180.00 | 1,553.01 |
| 1990 | 459.00 | 215.00 | 211.00 | 93.00 | 89.00 | 23.00 | 76.00 | 46.00 | 0.74 | 13.00 | 96.00 | 293.00 | 1,614.74 |
| 1991 | 440.00 | 368.00 | 91.00 | 211.00 | 61.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 90.00 | 156.00 | 1,417.00 |
| 1992 | 179.00 | 461.00 | 247.00 | 181.00 | 61.00 | 61.50 | 51.00 | 101.00 | 104.00 | 122.00 | 245.00 | 110.00 | 1,923.50 |
| 1993 | 450.04 | 241.00 | 201.00 | 205.00 | 25.00 | 70.00 | 0.00 | 0.00 | 0.00 | 0.00 | 153.00 | 303.00 | 1,648.04 |
| 1994 | 403.00 | 249.00 | 518.00 | 143.00 | 19.00 | 1.09 | 0.00 | 0.00 | 0.00 | 5.00 | 38.00 | 116.00 | 1,492.09 |
| 1995 | 391.00 | 730.00 | 485.00 | 253.00 | 5.00 | 105.00 | 117.00 | 0.00 | 2.00 | 124.00 | 356.00 | 320.00 | 2,888.00 |
| 1996 | 369.00 | 359.00 | 98.00 | 85.00 | 0.00 | 0.00 | 0.00 | 38.00 | 0.00 | 221.00 | 131.00 | 230.00 | 1,531.00 |
| 1997 | 185.00 | 150.00 | 51.00 | 224.00 | 42.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 6.00 | 168.00 | 826.00 |
| 1998 | 179.00 | 210.00 | 501.00 | 236.00 | 22.00 | 214.00 | 78.00 | 5.00 | 90.00 | 278.00 | 316.00 | 492.00 | 2,621.00 |
| 1999 | 320.00 | 404.00 | 406.00 | 215.00 | 100.00 | 7.00 | 0.00 | 0.00 | 0.00 | 40.00 | 154.00 | 228.00 | 1,874.00 |
| 2000 | 50.00 | 524.00 | 270.00 | 143.00 | 65.00 | 13.00 | 5.00 | 0.00 | 0.00 | 21.00 | 121.00 | 58.00 | 1,270.00 |
| 2001 | 304.00 | 268.00 | 264.00 | 91.00 | 29.00 | 79.00 | 39.00 | 0.00 | 0.00 | 115.00 | 117.00 | 0.00 | 1,306.00 |
| 2002 | 308.00 | 430.00 | 269.00 | 92.00 | 62.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 76.00 | 368.00 | 1,605.00 |
| 2003 | 167.00 | 247.00 | 132.00 | 12.00 | 28.00 | 3.00 | 0.00 | 0.00 | 0.00 | 0.00 | 212.00 | 248.00 | 1,049.00 |
| 2004 | 178.00 | 202.00 | 219.00 | 1.00 | 93.00 | 5.00 | 0.00 | 0.00 | 0.00 | 0.00 | 204.00 | 428.00 | 1,330.00 |
| 2005 | 229.00 | 182.00 | 168.00 | 148.00 | 0.00 | 194.00 | 4.00 | 0.00 | 16.00 | 60.00 | 0.00 | 555.00 | 1,556.00 |
| 2006 | 327.00 | 176.00 | 167.00 | 283.00 | 105.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 246.00 | 1,304.00 |
| 2007 | 16.00 | 165.00 | 196.00 | 233.00 | 78.00 | 42.00 | 36.00 | 0.00 | 0.00 | 32.00 | 66.00 | 648.00 | 1,512.00 |
| 2008 | 272.00 | 298.00 | 274.00 | 125.00 | 11.00 | 1.00 | 0.00 | 0.00 | 0.00 | 91.00 | 330.00 | 151.00 | 1,553.00 |
| 2009 | 307.00 | 337.00 | 84.00 | 107.00 | 58.00 | 1.00 | 1.50 | 0.00 | 0.00 | 0.00 | 118.00 | 127.00 | 1,140.50 |
| 2010 | 136.00 | 216.00 | 284.00 | 174.00 | 229.00 | 101.00 | 62.00 | 27.00 | 275.00 | 219.00 | 214.00 | 280.00 | 2,217.00 |
| 2011 | 507.00 | 426.00 | 196.00 | 314.00 | 194.00 | 0.00 | 0.00 | 0.00 | 0.00 | 13.00 | 69.00 | 319.00 | 2,038.00 |
| 2012 | 407.00 | 427.00 | 427.00 | 179.00 | 99.00 | 0.00 | 0.00 | 0.00 | 0.00 | 9.00 | 172.00 | 291.00 | 2,011.00 |
| 2013 | 652.00 | 341.00 | 165.00 | 205.00 | 124.00 | 278.00 | 49.00 | 0.00 | 0.00 | 0.00 | 360.00 | 365.00 | 2,539.00 |
| 2014 | 291.00 | 182.00 | 124.00 | 204.00 | 137.00 | 50.00 | 28.50 | 0.00 | 0.00 | 0.00 | 176.50 | 511.50 | 1,704.50 |
| 2015 | 338.00 | 384.00 | 458.00 | 258.50 | 8.00 | 21.00 | 0.00 | 0.00 | 0.00 | 0.00 | 106.50 | 290.00 | 1,864.00 |
| 2016 | 202.00 | 326.00 | 302.00 | 272.00 | 161.00 | 118.00 | 44.00 | 164.00 | 159.50 | 320.50 | 218.90 | 347.70 | 2,635.60 |
| 2017 | 325.70 | 327.10 | 219.50 | 132.20 | 89.40 | 32.90 | 13.60 | 3.00 | 57.20 | 69.60 | 709.80 | 178.50 | 2,158.50 |
| 2018 | 534.40 | 232.90 | 157.90 | 80.70 | 29.00 | 0.00 | 0.00 | 0.00 | 25.80 | 0.00 | 182.20 | 168.70 | 1,411.60 |
| 2019 | 433.30 | 65.00 | 373.00 | 92.60 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 10.00 | 170.80 | 1,144.70 |
| Rata-rata | 317.59 | 290.17 | 251.11 | 161.35 | 76.81 | 54.38 | 20.95 | 13.37 | 28.27 | 61.46 | 163.19 | 258.88 | 1,697.54 |
Berdasarkan rata-rata curah hujan bulanan di Stasiun Waduk Nawangan Desa Platarejo, Kecamatan Giriwoyo, KAB. WONOGIRI, Provinsi JAWA TENGAH, Musim Basah terjadi mulai bulan September. Musim basah ditandai dengan curah hujan tinggi, tanah yang lebih lembab, dan seringnya terjadi hujan lebat. Sedangkan Musim Kering terjadi mulai bulan Desember. 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 1697.54 mm/tahun. Curah hujan bulanan rata-rata maksimum adalah sebesar 317.59 mm/bulan. Berdasakan data curah hujan tahunan, dengan menggunakan metode regresi linear sederhana, diperoleh kesimpulan bahwa Curah hujan menunjukkan tren meningkat dengan kemiringan sebesar 2.1775
