In September, the weather in Kuujjuarapik is typically cold. Average daily high temperature in September is about 9 degrees above zero. On average, Kuujjuarapik has 20 rainy, 7 cloudy, and 3 sunny days in September. The rains are usually heavy. September as well as January, February, March, and August is considered the most uncomfortable time to visit Kuujjuarapik.