January in Hilliard is the snowiest, the windiest, the cloudiest, and the coldest month of the year. In January, the weather in Hilliard is typically freezing. Average daily high temperature in January is about zero. On average, Hilliard has 14 cloudy, 5 rainy, 4 snowy, 4 sunny, and 4 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 Hilliard.