December weather forecast in Idaho Falls

December in Idaho Falls is the snowiest month of the year. In December, the weather in Idaho Falls is typically freezing. Average daily high temperature in December is about zero. On average, Idaho Falls has 9 sunny, 8 cloudy, 8 partly cloudy, 4 snowy, and 2 rainy days in December. The snowfalls are usually light. December as well as January, February, March, and April is considered the most uncomfortable time to visit Idaho Falls.