If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Brisco: The hottest months are usually July and August with an average temp of 52°F, while the coldest months are December and February with an average of 14°F. The snowiest months in Brisco are January, February, April, and March, with each month seeing an average of 124 inches of snowfall.