January in Cunnamulla is the rainiest and the hottest month of the year. In January, the weather in Cunnamulla is typically hot. Average daily high temperature in January is about 35 degrees above zero. On average, Cunnamulla has 18 sunny, 5 rainy, 5 partly cloudy, and 3 cloudy days in January. The rains are usually heavy. January as well as February and December is considered the most uncomfortable time to visit Cunnamulla.