September in Nowra is the windiest month of the year. In September, the weather in Nowra is typically warm. Average daily high temperature in September is about 18 degrees above zero. On average, Nowra has 19 sunny, 9 partly cloudy, and 2 rainy days in September. The rains are usually moderate. September as well as January, May, and October is considered the most comfortable time to visit Nowra.