December weather forecast in Zion National Park

December in Zion National Park is the coldest month of the year. In December, the weather in Zion National Park is typically cold. Average daily high temperature in December is about 6 degrees above zero. On average, Zion National Park has 17 sunny, 11 partly cloudy, and 3 rainy days in December. The rains are usually moderate. December as well as January and February is considered the most uncomfortable time to visit Zion National Park.