If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Les Rousses: The hottest months are usually July and August with an average temp of 57°F, while the coldest months are February and January with an average of 33°F. The rainiest months in Les Rousses are December, May, June, and August, with each month seeing an average of 9 inches of rainfall.