When is the best time to climb Mont Blanc?

The best time of year to climb Mont Blanc is between the months of June to September with the months of July and August considered the 'peak' period. This is because of the great and reliable weather experienced during the summer months throughout Europe. So, if you're climbing during these months, expect crowds along the Tour du Mont Blanc and surrounding towns such as Chamonix. 

However, the weather conditions in the mountains can change rapidly and can also be unpredictable so just because you're traveling in summer doesn't guarantee you'll experience great weather. The conditions for climbing can also be affected by the previous winter season's snowfall, so keep this in mind when you're planning when to climb. 

You should also be mindful of booking your accommodation well in advance as there are a limited number of options and they can get full relatively quickly. 

Climbing Mont Blanc in the winter months of December, January, and February is simply not advisable as weather conditions make what is already a difficult and challenging climb that much more difficult and challenging. Since the weather in winter can be bitter and reach temperatures as low as 12°F, climbing during these months won't even be enjoyable. If you want to avoid the crowds and not travel during the peak periods, try climbing in either June or September, as there'll be fewer people on the trails, and accommodation prices won't be as expensive.