Worst air pollution Chamonix-Mont-Blanc, today and tomorrow
Today (16 July): Air quality in Chamonix-Mont-Blanc is fair. O3 is fair; AQI and NO2 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 AM (NO2: 41.6/100).
Tomorrow (17 July 2026): Air quality in Chamonix-Mont-Blanc is fair. AQI worsens to fair; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 38.1/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Chamonix-Mont-Blanc's air quality is shaped mainly by valley motorway traffic and light industry, with its position near the Rhone playing a role, and mountain valley winds alternate with calm temperature inversions, which helps maintain reasonable air quality across the year. Winter is typically the worst season, as cold air settles in the valleys and traps traffic and heating emissions for days at a time; summer sees better dispersion but occasional ozone build-up in the lower valleys.
Today - 16 July | Pollution peaks at 04:00
AQI:
Medium
41.6/100
PM2.5 (fine particles):
Good
18.5/100
PM10 (coarse particles):
Good
9.4/100
NO2 (nitrogen dioxide):
Medium
41.6/100
O3 (ozone):
Fair
36.5/100
SO2 (sulfur dioxide):
Good
2.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.2/100
PM1 (ultrafine particles):
Good
17.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 23:00
AQI:
Fair
38.1/100
PM2.5 (fine particles):
Good
14.4/100
PM10 (coarse particles):
Good
16.0/100
NO2 (nitrogen dioxide):
Fair
38.1/100
O3 (ozone):
Fair
35.7/100
SO2 (sulfur dioxide):
Good
2.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.1/100
PM1 (ultrafine particles):
Good
7.6/100
Pollen forecast in Chamonix-Mont-Blanc
View pollen forecastFrequently Asked Questions
Is air quality bad in Chamonix-Mont-Blanc right now?
On 16 July 2026, overall air quality in Chamonix-Mont-Blanc is fair. O3 is the main pollutant at 36.5/100. Pollution peaks around 4:00 AM (NO2: 41.6/100).
Will air quality be worse tomorrow in Chamonix-Mont-Blanc?
On 17 July 2026, air quality conditions in Chamonix-Mont-Blanc will be similar to today, with AQI forecast at fair at 38.1/100. Pollution peaks around 11:00 PM (NO2: 38.1/100).
When is air pollution at its worst in Chamonix-Mont-Blanc?
Residents in Chamonix-Mont-Blanc tend to notice the most discomfort when valley motorway traffic and light industry build up alongside the spring peak in birch and oak pollen; mountain valley winds alternate with calm temperature inversions, which typically keeps things from getting worse for long. Nearby alpine valley pasture and orchards add a further seasonal factor.
Are air quality levels in Chamonix-Mont-Blanc based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
For long term forecasts and maps, see the Airmine app