Histórico dos Últimos 15 Anos, em mm
| Ano/Mês | Jan | Fev | Mar | Abr | Mai | Jun | Jul | Ago | Set | Out | Nov | Dez | Total |
| 1995 | 102,0 | 493,0 | 211,0 | 47,0 | 73,0 | 19,0 | 30,0 | 0,0 | 59,0 | 116,0 | 100,0 | 275,0 | 1.525,0 |
| 1996 | 287,0 | 100,0 | 119,0 | 84,0 | 56,0 | 28,0 | 0,0 | 15,0 | 202,0 | 76,0 | 147,0 | 186,0 | 1.300,0 |
| 1997 | 502,0 | 231,0 | 54,0 | 60,0 | 113,0 | 226,0 | 43,0 | 0,0 | 65,0 | 104,0 | 229,0 | 195,0 | 1.822,0 |
| 1998 | 168,0 | 256,0 | 266,0 | 97,0 | 98,0 | 8,0 | 4,0 | 70,0 | 78,0 | 207,0 | 40,0 | 413,0 | 1.705,0 |
| 1999 | 429,0 | 218,0 | 49,0 | 112,0 | 85,0 | 96,0 | 0,0 | 0,0 | 133,0 | 90,0 | 37,0 | 217,0 | 1.466,0 |
| 2000 | 487,0 | 283,0 | 248,0 | 5,0 | 10,0 | 13,0 | 60,0 | 73,0 | 125,0 | 36,0 | 332,0 | 200,0 | 1.872,0 |
| 2001 | 289,0 | 178,0 | 192,0 | 47,0 | 70,0 | 40,0 | 10,0 | 70,0 | 72,0 | 199,0 | 185,0 | 215,0 | 1.567,0 |
| 2002 | 387,0 | 282,0 | 133,0 | 19,0 | 104,0 | 0,0 | 50,0 | 46,0 | 54,0 | 10,0 | 138,0 | 257,0 | 1.480,0 |
| 2003 | 442,0 | 124,5 | 118,0 | 86,0 | 59,0 | 15,0 | 5,0 | 31,0 | 18,0 | 115,0 | 341,0 | 162,0 | 1.516,5 |
| 2004 | 231,0 | 289,0 | 97,0 | 125,0 | 238,0 | 53,0 | 64,0 | 0,0 | 10,0 | 162,0 | 108,0 | 215,0 | 1.592,0 |
| 2005 | 419,0 | 143,0 | 131,0 | 74,0 | 120,0 | 53,0 | 10,0 | 7,0 | 44,0 | 202,0 | 110,0 | 270,0 | 1.583,0 |
| 2006 | 263,0 | 156,0 | 269,0 | 46,0 | 5,0 | 30,0 | 13,0 | 21,0 | 58,0 | 93,0 | 106,0 | 235,0 | 1.295,0 |
| 2007 | 393,0 | 151,0 | 142,0 | 41,0 | 75,5 | 0,0 | 179,5 | 0,0 | 0,0 | 71,0 | 201,5 | 212,5 | 1.467,0 |
| 2008 | 243,0 | 228,5 | 144,5 | 125,0 | 58,0 | 43,5 | 0,0 | 62,0 | 34,0 | 130,0 | 165,5 | 212,5 | 1.446,5 |
| 2009 | 447,5 | 169,5 | 170,0 | 133,5 | 71,0 | 23,5 | 75,5 | 157,0 | 134,0 | 234,0 | 213,5 | 324,5 | 2.153,5 |
| Média | 339,3 | 220,2 | 156,2 | 73,4 | 82,4 | 43,2 | 36,3 | 36,8 | 72,4 | 123,0 | 163,6 | 239,3 | 1.586,0 |