December in North Platte is the snowiest and the coldest month of the year. In December, the weather in North Platte is typically cold. Average daily high temperature in December is about 1 degree above zero. On average, North Platte has 15 sunny, 13 partly cloudy, 2 cloudy, and 1 snowy day in December. The snowfalls are usually light. December as well as January and February is considered the most uncomfortable time to visit North Platte.