January in Thief River Falls is the snowiest and the most freezing month of the year. In January, the weather in Thief River Falls is typically freezing. Average daily high temperature in January is about 8 degrees below zero. On average, Thief River Falls has 10 partly cloudy, 7 sunny, 7 cloudy, 6 snowy, and 1 rainy day in January. The snowfalls are usually light. January as well as March, April, October, and November is considered the most uncomfortable time to visit Thief River Falls.