August in Araruama is the windiest and the sunniest month of the year. In August, the weather in Araruama is typically warm. Average daily high temperature in August is about 25 degrees above zero. On average, Araruama has 26 sunny, 4 partly cloudy, and 1 rainy day in August. August as well as May, June, and July is considered the most comfortable time to visit Araruama.