January weather forecast in Mason City

January in Mason City is the snowiest, the cloudiest, and the most freezing month of the year. In January, the weather in Mason City is typically freezing. Average daily high temperature in January is about 3 degrees below zero. On average, Mason City has 11 partly cloudy, 8 cloudy, 7 sunny, and 5 snowy days in January. The snowfalls are usually light.