In December, the weather in Coral Harbour is typically freezing. Average daily high temperature in December is about 17 degrees below zero. On average, Coral Harbour has 13 partly cloudy, 11 cloudy, 6 sunny, and 1 snowy day 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.