August in Curitiba is the sunniest month of the year. In August, the weather in Curitiba is typically warm. Average daily high temperature in August is about 20 degrees above zero. On average, Curitiba has 11 sunny, 8 rainy, 7 partly cloudy, and 5 cloudy days in August. The rains are usually heavy. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Curitiba.