August in Rantepao is the sunniest month of the year. In August, the weather in Rantepao is typically warm. Average daily high temperature in August is about 22 degrees above zero. On average, Rantepao has 22 rainy, 8 cloudy, and 1 sunny day in August. The rains are usually heavy. August as well as January, February, March, and April is considered the most uncomfortable time to visit Rantepao.