In September, the weather in Holstebro is typically warm. Average daily high temperature in September is about 16 degrees above zero. On average, Holstebro has 20 rainy, 6 sunny, 3 partly cloudy, and 1 cloudy day in September. The rains are usually moderate. September as well as January, February, October, and November is considered the most uncomfortable time to visit Holstebro.