August in Kiana is the rainiest month of the year. In August, the weather in Kiana is typically warm. Average daily high temperature in August is about 13 degrees above zero. On average, Kiana has 13 rainy, 7 cloudy, 6 sunny, and 5 partly cloudy days in August. The rains are usually moderate. August as well as January, February, March, and May is considered the most uncomfortable time to visit Kiana.