In August, the weather in Wausau is typically warm. Average daily high temperature in August is about 23 degrees above zero. On average, Wausau has 18 sunny, 10 partly cloudy, 2 rainy, and 1 cloudy day 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 Wausau.