August weather forecast in Nagaoka

August in Nagaoka is the hottest month of the year. In August, the weather in Nagaoka is typically hot. Average daily high temperature in August is about 31 degrees above zero. On average, Nagaoka has 16 rainy, 6 sunny, 6 partly cloudy, and 3 cloudy days in August. The rains are usually heavy. August as well as January, February, March, and July is considered the most uncomfortable time to visit Nagaoka.