If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Les Allues: The hottest months are usually July and August, with an average temperature of 12°C, while the coldest months are January and February, with an average of -4°C. The rainiest months in Les Allues are December, May, January and November, with each month seeing an average of 183 mm of rainfall.