| Month: December 2009 | ||||
| Date | Rain acc | Rain mm | Comment | Mean 1960-1990 |
| 1 | 2.4 | 2.4 | 3.3 | |
| 2 | 6.4 | 4 | 6.7 | |
| 3 | 8.5 | 2.1 | 10.0 | |
| 4 | 11.4 | 2.9 | 13.3 | |
| 5 | 14.6 | 3.2 | 16.7 | |
| 6 | 25.5 | 10.9 | 20.0 | |
| 7 | 30.8 | 5.3 | 23.3 | |
| 8 | 38.2 | 7.4 | 26.7 | |
| 9 | 39 | 0.8 | 30.0 | |
| 10 | 39.2 | 0.2 | 33.3 | |
| 11 | 39.2 | 36.7 | ||
| 12 | 39.4 | 0.2 | 40.0 | |
| 13 | 39.6 | 0.2 | 43.3 | |
| 14 | 39.8 | 0.2 | 46.7 | |
| 15 | 40.3 | 0.5 | 50.0 | |
| 16 | 40.5 | 0.2 | 53.3 | |
| 17 | 41.8 | 1.3 | 56.7 | |
| 18 | 41.8 | 60.0 | ||
| 19 | 41.8 | 63.3 | ||
| 20 | 42 | 0.2 | 66.7 | |
| 21 | 42.2 | 0.2 | 70.0 | |
| 22 | 42.4 | 0.2 | 73.3 | |
| 23 | 48.9 | 6.5 | 76.7 | |
| 24 | 50.9 | 2 | 80.0 | |
| 25 | 51.4 | 0.5 | 83.3 | |
| 26 | 53.4 | 2 | 86.7 | |
| 27 | 54.4 | 1 | 90.0 | |
| 28 | 54.9 | 0.5 | 93.3 | |
| 29 | 54.9 | 11 | 96.7 | |
| 30 | 68.9 | 3 | 100.0 | |
| 31 | 68.9 | 100 | ||