August in Gagnoa is the cloudiest and the coldest month of the year. In August, the weather in Gagnoa is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Gagnoa has 30 rainy and 1 cloudy day in August. The rains are usually heavy. August as well as March, April, May, and June is considered the most uncomfortable time to visit Gagnoa.