If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Sackville: The hottest months are usually July and August with an average temp of 63°F, while the coldest months are January and February with an average of 24°F. The snowiest months in Sackville are February, March, January, and November, with each month seeing an average of 38 inches of snowfall.