July in Colac is the cloudiest and the coldest month of the year. In July, the weather in Colac is typically warm. Average daily high temperature in July is about 11 degrees above zero. On average, Colac has 25 rainy, 4 cloudy, and 2 sunny days in July. The rains are usually moderate. July as well as May, June, August, and September is considered the most uncomfortable time to visit Colac.