Taking into account the local weather in Southgate is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually July and August with an average temp of 64°F, while the coldest months are February and January with an average of 25°F. The snowiest months in Southgate are January, February, November, and December, with each month seeing an average of 11 inches of snowfall.