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Chamonix-Mont-Blanc Weather in May
May in Chamonix-Mont-Blanc brings low temperatures, with daytime highs of 12°C (54°F) and nights around 1°C (34°F). Quite a bit of rainfall is expected, around 155 mm (6.1 in), so pack an umbrella.
Rainfall in Chamonix-Mont-Blanc in May
You can typically expect 20 days of rain this month, averaging around 155 mm (6.1 in). Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.
Temperature in Chamonix-Mont-Blanc in May
Expect highs of 12°C (54°F) in Chamonix-Mont-Blanc in May, with nights dropping to around 1°C (34°F). Cold conditions persist throughout the day, so warm clothing is important from the moment you head outside. At 1°C (34°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Chamonix-Mont-Blanc in May
The month enjoys around 202 hours of sunshine, creating mostly sunny days despite the cool temperatures.Our weather planner can help you find worldwide destinations with pleasant weather during this period. July and August typically offer the best weather for Chamonix-Mont-Blanc.
Chamonix-Mont-Blanc Temperature in May
Min Temperature
1°C (34°F)
Max Temperature
12°C (54°F)
Chance of Rain
67%
Precipitation
155 mm (6.1 in)
Rainy days
20 days
Sunshine
202 hours
Percentage Sunshine
Chamonix-Mont-Blanc Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Chamonix-Mont-Blanc - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Chamonix-Mont-Blanc typically rise from around 15°C (59°F) at the start of May to approximately 18°C (64°F) by the end. Nights are cold, with lows typically ranging from 4°C (39°F) to 8°C (46°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather records for Chamonix-Mont-Blanc in May
Browse day-by-day weather records for Chamonix-Mont-Blanc spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Chamonix-Mont-Blanc historical weather extremes in May
Our historical data for Chamonix-Mont-Blanc spans 1976 to 2026, revealing these weather extremes.
- On May 30, 2001, temperatures climbed to 30°C (86°F), marking the warmest May day on record.
- Chamonix-Mont-Blanc registered its coldest May night on May 8, 1997, with temperatures dropping to -14°C (7°F).
- The heaviest May precipitation occurred on May 31, 2010, when 67 mm (2.6 in) of precipitation fell.
Best Places in France in May
Find out more about the weather in France and which places have the best travel conditions in this month. See all of France in May →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Chamonix-Mont-Blanc in May
The weather can swing between comfortable and chilly in May, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. It's going to pour! Pack a good poncho and prepare for very wet conditions. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Chamonix-Mont-Blanc in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming4/10 -
Cycling5/10 -
Walking5/10 -
Camping3/10 -
Outdoor sports5/10
Chamonix-Mont-Blanc 3-Day Forecast
More climate data for Chamonix-Mont-Blanc
See the full Chamonix-Mont-Blanc climate overview or explore weather in France.
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