In August, the weather in Yuma is typically warm. Average daily high temperature in August is about 21 degrees above zero. On average, Yuma has 12 partly cloudy, 10 sunny, 5 rainy, and 4 cloudy days in August. The rains are usually light. August as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most comfortable time to visit Yuma.