January in Colac is the sunniest and the warmest month of the year. In January, the weather in Colac is typically warm. Average daily high temperature in January is about 22 degrees above zero. On average, Colac has 11 sunny, 11 partly cloudy, 8 rainy, and 1 cloudy day in January. The rains are usually moderate. January as well as February is considered the most comfortable time to visit Colac.