In September, the weather in Kranjska Gora is typically warm. Average daily high temperature in September is about 17 degrees above zero. On average, Kranjska Gora has 14 rainy, 7 sunny, 7 partly cloudy, and 2 cloudy days in September. The rains are usually heavy. September as well as February, March, April, and May is considered the most uncomfortable time to visit Kranjska Gora.