August in Ballarat is the rainiest month of the year. In August, the weather in Ballarat is typically warm. Average daily high temperature in August is about 10 degrees above zero. On average, Ballarat has 23 rainy, 4 sunny, 3 cloudy, and 1 partly cloudy day in August. The rains are usually moderate. August as well as July and September is considered the most uncomfortable time to visit Ballarat.