August in Cassino is the sunniest and the warmest month of the year. In August, the weather in Cassino is typically warm. Average daily high temperature in August is about 26 degrees above zero. On average, Cassino has 26 sunny, 3 rainy, and 2 partly cloudy days in August. The rains are usually light. August as well as July is considered the most comfortable time to visit Cassino.