| Month: August 2009 | ||||
| Date | Rain acc | Rain mm | Comment | Mean 1960-1990 |
| 1 | 0.2 | 0.2 | 2.0 | |
| 2 | 3.4 | 3.2 | 4.1 | |
| 3 | 5.2 | 1.8 | 6.1 | |
| 4 | 15.8 | 10.6 | 8.2 | |
| 5 | 17.1 | 1.3 | 10.2 | |
| 6 | 17.3 | 0.2 | 12.3 | |
| 7 | 17.3 | 14.3 | ||
| 8 | 18.3 | 1 | Otter Valley | 16.4 |
| 9 | 18.3 | 18.4 | ||
| 10 | 19.6 | 1.3 | 20.5 | |
| 11 | 19.6 | 22.5 | ||
| 12 | 19.6 | 24.6 | ||
| 13 | 25.2 | 5.6 | 26.6 | |
| 14 | 25.2 | 28.7 | ||
| 15 | 25.2 | 30.7 | ||
| 16 | 25.2 | 32.8 | ||
| 17 | 25.2 | 34.8 | ||
| 18 | 25.2 | 36.9 | ||
| 19 | 25.2 | 38.9 | ||
| 20 | 27.3 | 2.1 | 41.0 | |
| 21 | 28.3 | 1 | 43.0 | |
| 22 | 28.5 | 0.2 | 45.1 | |
| 23 | 28.5 | 47.1 | ||
| 24 | 32.7 | 4.2 | 49.2 | |
| 25 | 35.6 | 2.9 | 51.2 | |
| 26 | 39.8 | 4.2 | 53.3 | |
| 27 | 40 | 0.2 | 55.3 | |
| 28 | 42.6 | 2.6 | 57.4 | |
| 29 | 42.6 | 59.4 | ||
| 30 | 43.9 | 1.3 | 61.5 | |
| 31 | 43.9 | 63.5 | ||