January in Gahanna is the snowiest, the windiest, the cloudiest, and the most freezing month of the year. In January, the weather in Gahanna is typically freezing. Average daily high temperature in January is about zero. On average, Gahanna has 14 cloudy, 5 snowy, 4 rainy, 4 sunny, and 4 partly cloudy days in January. The snowfalls are usually light. January as well as February, March, and December is considered the most uncomfortable time to visit Gahanna.