In September, the weather in Gorzow Wielkopolski is typically warm. Average daily high temperature in September is about 18 degrees above zero. On average, Gorzow Wielkopolski has 12 partly cloudy, 10 sunny, 4 rainy, and 4 cloudy days in September. The rains are usually light. September as well as August is considered the most comfortable time to visit Gorzow Wielkopolski.