January in New Ulm is the cloudiest and the most freezing month of the year. In January, the weather in New Ulm is typically freezing. Average daily high temperature in January is about 7 degrees below zero. On average, New Ulm has 21 cloudy, 4 snowy, 3 sunny, and 3 partly cloudy days in January. The snowfalls are usually light. January as well as March, April, and November is considered the most uncomfortable time to visit New Ulm.