September in Nachiki is the rainiest month of the year. In September, the weather in Nachiki is typically warm. Average daily high temperature in September is about 10 degrees above zero. On average, Nachiki has 21 rainy, 5 cloudy, and 4 sunny days in September. The rains are usually heavy. September as well as January, February, May, and August is considered the most uncomfortable time to visit Nachiki.