January in Frankfort is the coldest month of the year. In January, the weather in Frankfort is typically cold. Average daily high temperature in January is about 3 degrees above zero. On average, Frankfort has 10 cloudy, 9 rainy, 7 sunny, and 5 partly cloudy days in January. The rains are usually moderate. January as well as February, March, and December is considered the most uncomfortable time to visit Frankfort.