January in Townsville is the cloudiest and the hottest month of the year. In January, the weather in Townsville is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Townsville has 18 rainy, 6 sunny, 4 cloudy, and 3 partly cloudy days in January. The rains are usually heavy. January as well as February and March is considered the most uncomfortable time to visit Townsville.