August in Kieta is the sunniest and the coldest month of the year. In August, the weather in Kieta is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Kieta has 25 rainy and 6 sunny days in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Kieta.