In August, the weather in Scunthorpe is typically warm. Average daily high temperature in August is about 18 degrees above zero. On average, Scunthorpe has 20 rainy, 5 partly cloudy, 4 sunny, and 2 cloudy days in August. The rains are usually moderate. August as well as January, February, March, and June is considered the most uncomfortable time to visit Scunthorpe.