If you're looking forward to lots of outings with your partner, take a look at these details about year-round temperatures in Saint-Bon-Tarentaise: 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 -5°C. The rainiest months in Saint-Bon-Tarentaise are December, May, November and January, with each month seeing an average of 181 mm of rainfall.