January in Iowa City is the snowiest and the most freezing month of the year. In January, the weather in Iowa City is typically freezing. Average daily high temperature in January is about 1 degree below zero. On average, Iowa City has 9 sunny, 9 cloudy, 8 partly cloudy, 4 snowy, and 1 rainy day in January. The snowfalls are usually light. January as well as February, March, April, and May is considered the most uncomfortable time to visit Iowa City.