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 11 degrees above zero. On average, Nachiki has 16 rainy, 6 cloudy, 5 partly cloudy, and 3 sunny days in September. The rains are usually heavy. September as well as January, February, May, and June is considered the most uncomfortable time to visit Nachiki.