Planning for the weather is an important factor for making your trip to Terrace Bay a success, especially when you're splurging. The hottest months are usually August and July with an average temp of 55°F, while the coldest months are February and January with an average of 16°F. The snowiest months in Terrace Bay are April, January, February, and March, with each month seeing an average of 29 inches of snowfall.