Planning for the weather is an important factor for making your trip to Val-d’Isere a success, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 10°C, while the coldest months are January and February, with an average of -7°C. The rainiest months in Val-d’Isere are December, May, November and January, with each month seeing an average of 179 mm of rainfall.