September in Aurora is the sunniest month of the year. In September, the weather in Aurora is typically warm. Average daily high temperature in September is about 24 degrees above zero. On average, Aurora has 25 sunny, 4 partly cloudy, and 1 rainy day in September. The rains are usually light. September as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Aurora.