January in Toowoomba is the rainiest, the windiest, the cloudiest, and the hottest month of the year. In January, the weather in Toowoomba is typically hot. Average daily high temperature in January is about 30 degrees above zero. On average, Toowoomba has 11 sunny, 9 rainy, 9 partly cloudy, and 2 cloudy days in January. The rains are usually heavy. January as well as February and December is considered the most uncomfortable time to visit Toowoomba.