In March, the weather in Coral Harbour is typically freezing. Average daily high temperature in March is about 18 degrees below zero. On average, Coral Harbour has 20 partly cloudy, 9 sunny, 1 snowy, and 1 cloudy day in March. The snowfalls are usually light. March as well as January, February, April, and September is considered the most uncomfortable time to visit Coral Harbour.