If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Three Oaks: The hottest months are usually July and August with an average temp of 69°F, while the coldest months are January and February with an average of 31°F. The snowiest months in Three Oaks are January, February, November, and October, with each month seeing an average of 9 inches of snowfall.