Mont Blanc Climate and Average Weather
Climate of Mont Blanc: average temperatures, rainfall and seasons month by month.
Climate in Mont Blanc month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | -3° | -17° | 7,6 in | ★☆☆☆☆ |
| February | 1° | -13° | 5,9 in | ★☆☆☆☆ |
| March | 2° | -13° | 4,2 in | ★★☆☆☆ |
| April | 9° | -5° | 3,9 in | ★★☆☆☆ |
| May | 12° | -1° | 4,6 in | ★★☆☆☆ |
| June | 24° | 8° | 3,2 in | ★★☆☆☆ |
| July | 28° | 12° | 2,8 in | ★★☆☆☆ |
| August | 31° | 14° | 2,6 in | ★★☆☆☆ |
| September | 21° | 6° | 3,7 in | ★★☆☆☆ |
| October | 15° | 1° | 7,3 in | ★☆☆☆☆ |
| November | 3° | -12° | 9,3 in | ★☆☆☆☆ |
| December | 1° | -13° | 7,3 in | ★☆☆☆☆ |
Climate type: Polar. Source: Open-Meteo archive (ERA5).
Recent extremes in Mont Blanc
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How Mont Blanc compares with nearby places
Annual averages, and the difference against Mont Blanc.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Gran Paradiso National Park | 29 mi | 15°F | +43°F warmer | 49 in |
| Matterhorn | 39 mi | 9°F | +37°F warmer | 46 in |
| Geneva | 43 mi | 54°F | +82°F warmer | 48 in |
| Lake Geneva | 46 mi | 56°F | +84°F warmer | 45 in |
| Jungfrau | 72 mi | 12°F | +39°F warmer | 60 in |
Best time to visit Mont Blanc
Go in June, July and August. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, November and December - expect the least comfortable mix of heat, cold or rain.
What this means for Mont Blanc
Today is slightly warmer than average for October. The forecast high of 20°F is 5.4°F above the 15°F typical for this month.
A 25% chance means most of the area stays dry; a passing shower is possible but short.
Visibility is down to 0,1 mi - use low beams and leave extra following distance. Overnight lows near 15°F mean ice is possible on bridges before dawn.
At 15.774 ft, air here runs roughly 88°F cooler than the same latitude at sea level.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 64°F.
What to pack, what to skip
- A warm mid-layer and gloves for early mornings and evenings
- Insulated outer layer, hat and boots with grip for ice
- A packable rain shell - 2 of the next 7 days carry a real chance of rain
- Avoid high-elevation trails without traction devices - frozen surfaces persist in shade all day.
- If your dates are flexible, avoid January, November and December - historically the least comfortable months here.
Summary
Mont Blanc is a mountain in France. Mont Blanc is a mountain known as the highest summit in the Alps. It sits at 15.774 ft above sea level.
Right now it is 16°F (-9°C) in Mont Blanc with mainly clear. It feels like 9°F. Today runs from 15°F to 20°F. Chance of precipitation is 25%. Sightseeing conditions score 4.3/10 - marginal.
The best time to visit Mont Blanc is June, July and August. The climate is polar. January, November and December tend to be the least comfortable months. August is the warmest month with average highs near 31°F, while January is the coldest with lows near -17°F.
The closest major airport is Milan Malpensa Airport (MXP), about 91 mi away. Nearby highlights include Gran Paradiso National Park, Matterhorn, Lake Geneva and Jungfrau.
In plain terms. Today is slightly warmer than average for October. The forecast high of 20°F is 5.4°F above the 15°F typical for this month. The best window to be outside is roughly 9 AM to 12 PM, when temperature, rain chance and wind line up best. Visibility is down to 0,1 mi - use low beams and leave extra following distance. Overnight lows near 15°F mean ice is possible on bridges before dawn.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about Mont Blanc
Weather map for Mont Blanc
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore Mont Blanc
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is Mont Blanc?
Mont Blanc is a mountain in France. Its coordinates are 45.8326, 6.8652. It lies in Europe.
What is the weather like in Mont Blanc right now?
It is currently 16°F (-9°C) with mainly clear. Humidity is 87% and wind is 2 mph.
When is the best time to visit Mont Blanc?
June, July and August offer the most comfortable conditions in Mont Blanc, which has a polar climate. January, November and December are usually the hardest months for outdoor plans.
What time zone is Mont Blanc in?
Mont Blanc observes Europe/Rome (UTC+02:00). The local time is 4:49 AM.
What is the nearest airport to Mont Blanc?
The closest airports are Milan Malpensa Airport (MXP), 91 mi away, Zurich Airport (ZRH), 138 mi away and Venice Marco Polo Airport (VCE), 266 mi away.
What are the top things to do in Mont Blanc?
Popular options include Gran Paradiso National Park, Matterhorn, Lake Geneva, Jungfrau, Jungfraujoch and Eiger.
Related articles
Data sources and methodology
| Place data | USPOTUS Atlas dataset (mountains) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated October 2, 2026 at 4:49 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
