If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Celoron: The hottest months are usually July and August with an average temp of 65°F, while the coldest months are January and February with an average of 28°F. The snowiest months in Celoron are January, November, March, and December, with each month seeing an average of 8 inches of snowfall.