Chamonix Snow Conditions Overview
Chamonix in French Alps, France sits at 3,842m (12,606ft) elevation and averages 469cm of annual snowfall based on 10 years of historical data (2015-2025). During the ski season, Chamonix receives approximately 442cm of snow. The best month for powder is January, averaging 103.2cm of snowfall with a 48% powder probability. The highest chance of fresh powder (15cm+ in any given week) occurs in December and January at 51%.
- Annual Snowfall
- 469cm
- Elevation
- 3,842m
- Best Month
- January
- Powder Probability
- 51%
Snowfall data sourced from ERA5 reanalysis via Open-Meteo Historical Weather API (2015-2025).
Check Chamonix snow forecast for your dates
Based on 10 years of historical snowfall data
About Chamonix
Chamonix-Mont-Blanc, host of the first Winter Olympics in 1924, sits beneath the highest peak in the Alps at 4,808m. The resort's extreme altitude (skiing up to 3,842m on the Aiguille du Midi) produces exceptionally dry, cold powder and some of the most challenging off-piste terrain in the world. This page uses 10 years of historical snowfall data to help you identify the best weeks for fresh snow.
Snowfall patterns over the last decade
Across ERA5 reanalysis snowfall records from 2015 to 2025, Chamonix-Mont-Blanc averages 469cm (185 inches) of snowfall a year, with the November-through-April ski season delivering about 443cm of that total. January is the heaviest calendar month in the 10-year average at 103.2cm, followed by December at 90.5cm, March at 76.1cm, February at 70.1cm, November at 58.5cm, and April at 44.0cm. Ranked by powder probability — the share of weeks with at least 15cm of fresh snow — December leads at 51%, with January and February tied at 48%, ahead of November at 37%, March at 35% and April at 27%. The implication for trip planning is that mid-December through mid-February is the window with both the deepest totals and the highest powder-day odds.
Year-to-year variability is significant. January snowfall in the 10-year record ranges from 41.9cm in the driest winter to 204.2cm in the wettest — a roughly five-fold spread, but with a notably high floor by Alpine standards (every January in the record cleared 40cm). December is more volatile, swinging from 2.9cm in a quiet early-season to 182.6cm in a strong one, while February ranges from 5.8cm to 158.6cm and March from 12.7cm to 118.8cm. The wide December and February ranges are why two consecutive seasons can feel completely different on the same week, and why a multi-year baseline is more useful for choosing travel dates than any single-day snow report or short-range forecast.
For context against neighbouring Western Alpine resorts in the same dataset, Chamonix's 469cm annual average is moderate: nearby Verbier across the Mont Blanc massif averages 504cm, Saas-Fee 609cm, Zermatt 650cm, and Tignes in the Tarentaise 710cm. The reason despite Mont Blanc's 4,808m summit is that Chamonix's lift-served ski sectors (Grands Montets, Brévent-Flégère, Les Houches, Le Tour) actually top out between roughly 2,500m and 3,300m at the Grands Montets summit, with bases in the valley near 1,035m — so the resort's totals reflect a relatively narrow valley with the heaviest snow concentrating on the upper sectors. For peak powder probability the mid-December through mid-February window is the most reliable; the highest single-day records in the dataset all fall within this same window, with off-piste-grade powder weeks possible into March in a strong year.
Snow & Weather Conditions
We use 10 years of historical data to help you plan — not a live snow report.
The French Alps receive substantial snowfall from Atlantic and Mediterranean storm systems. High-altitude resorts benefit from reliable natural snow, while purpose-built ski stations ensure slope-side convenience. At this extreme altitude, temperatures stay well below freezing for much of the season, preserving snow quality and enabling a long winter with deep, reliable snowpack. The high-alpine climate means precipitation often falls as dry, light powder even during milder weather events. Cumulative seasonal totals routinely top 8-12 metres, packing down into a base layer 3-4 metres deep by mid-winter.
Best Time to Ski
The best time to ski at Chamonix is December and January, with 90.5cm average snowfall and 51% powder probability. Based on 10 years of historical snowfall data from PowderDays. The French Alps season runs from early December to late April. January and February provide the most reliable snowfall and coldest temperatures. Browse PowderDays' decade-spanning snow statistics to pinpoint the weeks with the heaviest accumulations.
Powder Probability by Month
Chance of 15cm+ fresh snow in any given week (10 years of data):
- Nov37%
- Dec51%
- Jan48%
- Feb48%
- Mar35%
- Apr27%
10-Year Snow History
| Month | Avg Snowfall (cm) | Record High | Record Low | Powder Probability |
|---|---|---|---|---|
| Nov | 58.5 | 119.9 | 3.0 | 37% |
| Dec | 90.5 | 182.6 | 2.9 | 51% |
| Jan | 103.2 | 204.2 | 41.9 | 48% |
| Feb | 70.1 | 158.6 | 5.8 | 48% |
| Mar | 76.1 | 118.8 | 12.7 | 35% |
| Apr | 44.0 | 72.4 | 0.0 | 27% |
What Makes It Special
France hosts some of the world's largest interconnected ski areas (Les 3 Vallées, Paradiski, Portes du Soleil), offering hundreds of kilometres of marked pistes and extensive off-piste options. French ski culture is synonymous with gastronomy — expect Michelin-quality mountain restaurants, fine wines, raclette, and a relaxed, social approach to après-ski.
Chamonix-Mont-Blanc hosted the first Winter Olympic Games in 1924, establishing the French Alps as the birthplace of competitive alpine skiing. Les 3 Vallees (Courchevel, Meribel, Val Thorens) is the largest linked ski area in the world, with over 600km of interconnected pistes.
Data Sources & Methodology
All snowfall statistics for Chamonix are based on 10 years of historical data (2015-2025) from the Open-Meteo Historical Weather API, which provides ERA5 reanalysis data from the European Centre for Medium-Range Weather Forecasts (ECMWF). Daily snowfall totals are queried at Chamonix's coordinates (45.92, 6.87) and 3,842m elevation, then aggregated into monthly averages, record highs/lows, and powder probability scores. Powder probability represents the chance of receiving 15cm or more of fresh snow in any given week during that month.