| Dry Years | ||||||||||||
| Rainfall mm | ||||||||||||
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| 1978 | 0.00 | 1.40 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.00 | 8.40 |
| 1981 | 0.00 | 1.00 | 2.20 | 0.60 | 2.00 | 0.00 | 1.00 | 2.20 | 0.00 | 0.30 | 0.00 | 0.00 |
| 1983 | 2.00 | 3.00 | 1.90 | 0.00 | 3.60 | 1.00 | 0.00 | 0.10 | 0.00 | 0.00 | 0.00 | 2.50 |
| 1990 | 2.00 | 0.00 | 0.00 | 2.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 3.20 | 0.00 | 1.90 |
| 1995 | 0.20 | 0.40 | 10.90 | 0.20 | 1.00 | 0.00 | 0.00 | 0.00 | 0.10 | 0.10 | 0.20 | 0.40 |
| 1998 | 3.40 | 1.60 | 3.20 | 0.20 | 2.20 | 0.00 | 0.00 | 0.10 | 0.00 | 0.00 | 0.10 | 0.00 |
| 2002 | 1.70 | 1.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.50 | 2.60 | 0.00 |
| 2003 | 1.00 | 0.00 | 0.00 | 0.00 | 3.00 | 0.00 | 0.00 | 3.00 | 0.00 | 0.10 | 0.00 | 1.20 |
| 2004 | 5.00 | 0.60 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.40 | 0.10 | 0.10 |
| 2008 | 8.50 | 1.00 | 0.20 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 1.50 | 0.50 |
| 2011 | 3.80 | 3.20 | 0.20 | 4.60 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
| Total | 27.60 | 13.20 | 18.60 | 7.60 | 11.80 | 1.00 | 1.00 | 5.40 | 0.10 | 5.70 | 4.50 | 15.00 |
| Mean | 2.51 | 1.20 | 1.69 | 0.69 | 1.07 | 0.09 | 0.09 | 0.49 | 0.01 | 0.52 | 0.41 | 1.36 |
| STDEV | 2.57 | 1.07 | 3.26 | 1.43 | 1.38 | 0.30 | 0.30 | 1.06 | 0.03 | 0.99 | 0.85 | 2.49 |
| CV | 1.02 | 0.89 | 1.93 | 2.06 | 1.29 | 3.32 | 3.32 | 2.16 | 3.32 | 1.91 | 2.08 | 1.82 |
| Max | 8.50 | 3.20 | 10.90 | 4.60 | 3.60 | 1.00 | 1.00 | 3.00 | 0.10 | 3.20 | 2.60 | 8.40 |