January in Kansas City is the coldest month of the year. In January, the weather in Kansas City is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Kansas City has 14 partly cloudy, 12 sunny, 3 rainy, and 2 cloudy days in January. The rains are usually light. January as well as February, March, April, and December is considered the most uncomfortable time to visit Kansas City.