Last month was Australia's driest September on record, the Australian Bureau of Meteorology reported October 1, 2018. Nights were much cooler than average for the time of year over much of Victoria, South Australia and southern New South Wales.
September was an exceptionally dry month, especially across the southern mainland. Rainfall was the lowest on record for September both nationally, and for southern Australia (i.e. those areas south of 26°S). It was the second driest September on record for Victoria, third driest for Western Australia, and fourth driest for South Australia.
Rainfall totals were in the lowest 10% of historical rainfall totals for the month in large areas including greater southwestern Western Australia (southwest of a line between about Geraldton and Esperance), South Australia from Ceduna east across the Eyre Peninsula and agricultural districts, much of the western half of New South Wales, and nearly all of Victoria except parts of South and West Gippsland.