August in Townsville is the sunniest month of the year. In August, the weather in Townsville is typically warm. Average daily high temperature in August is about 25 degrees above zero. On average, Townsville has 21 sunny, 6 partly cloudy, 3 rainy, and 1 cloudy day in August. The rains are usually moderate. August as well as June and July is considered the most comfortable time to visit Townsville.