If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Cogne: The hottest months are usually July and August with an average temp of 60°F, while the coldest months are January and February with an average of 30°F. The snowiest months in Cogne are November, August, December, and February, with each month seeing an average of 9 inches of snowfall.