August in Calheta is the sunniest and the warmest month of the year. In August, the weather in Calheta is typically warm. Average daily high temperature in August is about 22 degrees above zero. On average, Calheta has 29 sunny, 1 rainy, and 1 partly cloudy day in August. The rains are usually light. August as well as July is considered the most comfortable time to visit Calheta.