January in Cincinnati is the snowiest, the cloudiest, and the coldest month of the year. In January, the weather in Cincinnati is typically cold. Average daily high temperature in January is about 1 degree above zero. On average, Cincinnati has 12 cloudy, 6 rainy, 5 sunny, 4 snowy, and 4 partly cloudy days in January. The rains are usually heavy. January as well as February, March, and December is considered the most uncomfortable time to visit Cincinnati.