September in Fianarantsoa is the windiest and the sunniest month of the year. In September, the weather in Fianarantsoa is typically warm. Average daily high temperature in September is about 21 degrees above zero. On average, Fianarantsoa has 21 sunny, 8 partly cloudy, and 1 rainy day in September. The rains are usually light. September as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Fianarantsoa.