January in Denton is the coldest month of the year. In January, the weather in Denton is typically warm. Average daily high temperature in January is about 13 degrees above zero. On average, Denton has 14 sunny, 7 partly cloudy, 6 rainy, and 4 cloudy days in January. The rains are usually moderate. January as well as May, June, July, and August is considered the most uncomfortable time to visit Denton.