September in Nyngan is the windiest month of the year. In September, the weather in Nyngan is typically warm. Average daily high temperature in September is about 22 degrees above zero. On average, Nyngan has 25 sunny, 4 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 Nyngan.