January in St. George is the windiest and the cloudiest month of the year. In January, the weather in St. George is typically warm. Average daily high temperature in January is about 19 degrees above zero. On average, St. George has 16 rainy, 9 partly cloudy, 4 cloudy, and 2 sunny days in January. The rains are usually heavy. January as well as February, March, July, and August is considered the most uncomfortable time to visit St. George.