January in Hayman Island is the cloudiest and the warmest month of the year. In January, the weather in Hayman Island is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Hayman Island has 17 rainy, 5 sunny, 5 cloudy, and 4 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 Hayman Island.