Weather can make or break a roadtrip, so we've gathered some data about year-round temperatures in Santa Fe to help you plan yours. The hottest months are usually July and June with an average temp of 67°F, while the coldest months are December and January with an average of 34°F. The snowiest months in Santa Fe are March, February, December, and January, with each month seeing an average of 6 inches of snowfall.