July in Oita is the rainiest month of the year. In July, the weather in Oita is typically warm. Average daily high temperature in July is about 27 degrees above zero. On average, Oita has 26 rainy, 4 sunny, and 1 cloudy day in July. The rains are usually heavy. July as well as January, February, March, and June is considered the most uncomfortable time to visit Oita.