September in Jessup is the sunniest month of the year. In September, the weather in Jessup is typically warm. Average daily high temperature in September is about 24 degrees above zero. On average, Jessup has 16 sunny, 10 partly cloudy, 3 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 Jessup.