Weather can make or break a roadtrip, so here's some data about year-round temperatures in Lake Blatchford to help you plan yours: The hottest months are usually July and August with an average temp of 56°F, while the coldest months are January and February with an average of -5°F. The snowiest months in Lake Blatchford are November, December, February, and January, with each month seeing an average of 11 inches of snowfall.