| Month: May 2009 | ||||
| Date | Rain acc | Rain mm | Comment | Mean 1960-1990 |
| 1 | 0 | 2.0 | ||
| 2 | 0.8 | 0.8 | 4.0 | |
| 3 | 0.8 | 6.0 | ||
| 4 | 0.8 | 8.0 | ||
| 5 | 0.8 | 10.0 | ||
| 6 | 0.8 | 12.0 | ||
| 7 | 0.8 | 14.0 | ||
| 8 | 0.8 | 16.0 | ||
| 9 | 0.8 | 18.0 | ||
| 10 | 0.8 | 20.0 | ||
| 11 | 0.8 | 22.0 | ||
| 12 | 0.8 | 24.0 | ||
| 13 | 0.8 | 26.0 | ||
| 14 | 7.7 | 6.9 | 28.0 | |
| 15 | 14.3 | 6.6 | 30.0 | |
| 16 | 23.3 | 9 | 32.0 | |
| 17 | 27 | 3.7 | 34.0 | |
| 18 | 34.7 | 7.7 | 36.0 | |
| 19 | 37.9 | 3.2 | 38.0 | |
| 20 | 45.4 | 7.5 | 40.0 | |
| 21 | 45.4 | 42.0 | ||
| 22 | 46.9 | 1.5 | 44.0 | |
| 23 | 46.9 | 46.0 | ||
| 24 | 46.9 | 48.0 | ||
| 25 | 46.9 | 50.0 | ||
| 26 | 46.9 | 52.0 | ||
| 27 | 63.7 | 16.8 | 54.0 | |
| 28 | 63.7 | 56.0 | ||
| 29 | 63.7 | 58.0 | ||
| 30 | 63.7 | 60.0 | ||
| 31 | 63.7 | 62 | ||