September in Silver Spring is the sunniest month of the year. In September, the weather in Silver Spring is typically warm. Average daily high temperature in September is about 24 degrees above zero. On average, Silver Spring has 15 sunny, 9 partly cloudy, 5 rainy, and 1 cloudy day in September. The rains are usually moderate. September as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Silver Spring.