I wouldn't be too fixated on averages Ant. At best they are only a rough indicator of what to expect.
Purely hypothetical: next year might be the start of a 10 year long wet cycle in which nearly every month is above average in rainfall. Yet looking at the 20 year period, we achieved 'average' conditions despite rarely achieving an average year.
It is misleading, particuarly in a highly variable and cyclical climate such as Australia's, to soley use averages as a benchmark.
YTD Rainfall = 281.0mm (Avg to March 117.0mm)
MTD rainfall March = 34.7mm(Avg 41.3mm)
February 2011 total = 203.9mm (Avg 37.8mm)
2010 Rainfall: 759.3mm (Annual Avg: 521.5mm)