January in Gainesville is the coldest month of the year. In January, the weather in Gainesville is typically warm. Average daily high temperature in January is about 13 degrees above zero. On average, Gainesville has 15 sunny, 8 partly cloudy, 5 rainy, and 3 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 Gainesville.