
| Month | Normal- 2006 | Actual (Millimeter) | ||||||
| 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | ||
| January | 4 | 0 | 1 | 5 | 2 | 15 | 6 | 0 |
| February | 13 | 42 | 0 | 0 | 38 | 0 | 6 | 0 |
| March | 15 | 8 | 0 | 15 | 61 | 3 | 26 | 11 |
| April | 76 | 149 | 4 | 167 | 83 | 75 | 14 | 104 |
| May | 160 | 246 | 259 | 128 | 149 | 127 | 129 | 133 |
| June | 251 | 381 | 231 | 248 | 304 | 344 | 159 | 184 |
| July | 342 | 125 | 163 | 411 | 346 | 417 | 395 | 181 |
| August | 280 | 166 | 102 | 263 | 204 | 123 | 418 | 138 |
| September | 331 | 326 | 501 | 327 | 166 | 149 | 188 | 293 |
| October | 224 | 12 | 370 | 38 | 269 | 385 | 624 | 84 |
| November | 6 | 0 | 25 | 5 | 0 | 0 | 0 | 24 |
| December | 3 | 0 | 0 | 0 | 2 | 2 | 0 | 4 |
| Total | 1715 | 1455 | 1656 | 1607 | 1624 | 1640 | 1965 | 1156 |