Weather can make or break a roadtrip, so here's some data about year-round temperatures in Litchfield to help you plan yours: The hottest months are usually July and August with an average temp of 73°F, while the coldest months are January and February with an average of 32°F. The snowiest months in Litchfield are January, March, December, and October, with each month seeing an average of 6 inches of snowfall.