In December, the weather in Bryce Canyon National Park is typically cold. Average daily high temperature in December is about 1 degree above zero. On average, Bryce Canyon National Park has 16 sunny, 9 partly cloudy, 4 snowy, and 2 cloudy days in December. The snowfalls are usually light. December as well as January, February, March, and November is considered the most uncomfortable time to visit Bryce Canyon National Park.