September in Mildura is the windiest month of the year. In September, the weather in Mildura is typically warm. Average daily high temperature in September is about 20 degrees above zero. On average, Mildura has 20 sunny, 9 partly cloudy, and 1 rainy day in September. The rains are usually light. September as well as April and October is considered the most comfortable time to visit Mildura.