Weather will likely play an important role when you plan your trip to Courmayeur, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August, with an average temperature of 13°C, while the coldest months are January and February, with an average of -4°C. The rainiest months in Courmayeur are December, May, January and June, with each month seeing an average of 207 mm of rainfall.