January in Hervey Bay is the cloudiest month of the year. In January, the weather in Hervey Bay is typically warm. Average daily high temperature in January is about 27 degrees above zero. On average, Hervey Bay has 13 rainy, 11 sunny, 5 partly cloudy, and 2 cloudy days in January. The rains are usually heavy. January as well as February and March is considered the most uncomfortable time to visit Hervey Bay.