December in Moose Jaw is the most freezing month of the year. In December, the weather in Moose Jaw is typically freezing. Average daily high temperature in December is about 8 degrees below zero. On average, Moose Jaw has 26 cloudy, 3 sunny, and 2 snowy 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 Moose Jaw.