January in Sandusky is the snowiest, the windiest, and the coldest month of the year. In January, the weather in Sandusky is typically freezing. Average daily high temperature in January is about zero. On average, Sandusky has 10 cloudy, 8 partly cloudy, 5 rainy, 4 snowy, and 4 sunny days in January. The rains are usually heavy. January as well as February, March, April, and November is considered the most uncomfortable time to visit Sandusky.