If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Conneaut: The hottest months are usually July and August with an average temp of 68°F, while the coldest months are February and January with an average of 31°F. The snowiest months in Conneaut are January, March, December, and November, with each month seeing an average of 7 inches of snowfall.