In December, the weather in Coral Harbour is typically freezing. Average daily high temperature in December is about 19 degrees below zero. On average, Coral Harbour has 10 cloudy, 8 sunny, 7 partly cloudy, and 6 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 Coral Harbour.