January in Mission Beach is the rainiest and the cloudiest month of the year. In January, the weather in Mission Beach is typically hot. Average daily high temperature in January is about 29 degrees above zero. On average, Mission Beach has 24 rainy, 4 partly cloudy, 2 sunny, and 1 cloudy day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Mission Beach.