Planning for the weather is a good way to make your trip to La Plagne-Tarentaise relaxing and enjoyable, especially when you're splurging. The hottest months are usually July and August with an average temp of 55°F, while the coldest months are January and February with an average of 26°F. The rainiest months in La Plagne-Tarentaise are May, December, January, and June, with each month seeing an average of 7 inches of rainfall.