In September, the weather in Scottsbluff is typically warm. Average daily high temperature in September is about 26 degrees above zero. On average, Scottsbluff has 19 sunny, 6 partly cloudy, and 5 rainy days 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 Scottsbluff.