In September, the weather in Narva-Joesuu is typically warm. Average daily high temperature in September is about 15 degrees above zero. On average, Narva-Joesuu has 14 rainy, 6 partly cloudy, 5 sunny, and 5 cloudy days in September. The rains are usually moderate. September as well as April, October, November, and December is considered the most uncomfortable time to visit Narva-Joesuu.