If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Antonito: The hottest months are usually July and August with an average temp of 63°F, while the coldest months are January and December with an average of 25°F. The snowiest months in Antonito are March, December, February, and January, with each month seeing an average of 7 inches of snowfall.