
| Month | Normal- 2006 | Actual (Millimeter) | ||||||
| 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | ||
| January | 14 | 2 | 0 | 32 | 0 | 0 | 25 | 0 |
| February | 14 | 62 | 1 | 0 | 4 | 0 | 4 | 0 |
| March | 44 | 4 | 29 | 16 | 67 | 3 | 86 | 1 |
| April | 62 | 74 | 48 | 48 | 38 | 77 | 96 | 48 |
| May | 121 | 227 | 118 | 74 | 71 | 62 | 69 | 111 |
| June | 196 | 239 | 330 | 187 | 251 | 268 | 189 | 106 |
| July | 303 | 356 | 241 | 304 | 219 | 176 | 283 | 501 |
| August | 277 | 158 | 161 | 327 | 238 | 323 | 244 | 297 |
| September | 255 | 285 | 159 | 275 | 124 | 221 | 187 | 331 |
| October | 170 | 57 | 212 | 61 | 255 | 235 | 428 | 115 |
| November | 225 | 1 | 9 | 61 | 20 | 0 | 0 | 3 |
| December | 4 | 0 | 0 | 0 | 22 | 0 | 1 | 0 |
| Total | 1480 | 1465 | 1308 | 1385 | 1309 | 1365 | 1612 | 1513 |