Worst air pollution Annecy, today and tomorrow
Today (20 September): Air quality in Annecy is moderate. AQI, PM2.5, and NO2 are moderate; PM10, O3, and PM1 are fair; SO2, CO, and HCHO are good. Pollution peaks around 9:00 AM (PM2.5: 41.8/100).
Tomorrow (21 September 2026): Air quality in Annecy is fair. AQI improves to fair; PM2.5 decreases to fair; PM10 decreases to good; NO2 decreases to fair; PM1 decreases to good; all other pollutants stay as today. Pollution peaks around 5:00 PM (O3: 30.4/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Annecy's air quality faces Alpine basin challenges, with the city's enclosed position between the Aravis and Bauges limestone massifs and the Annecy Lake's natural setting creating partial topographic enclosure. Vehicle traffic on the A41 and winter residential wood burning generate elevated PM2.5 under temperature inversions, while Lake Annecy's thermal lake breezes provide distinctive daily ventilation cycles and the surrounding Alpine environment generally maintains better summer conditions than France's flat basin cities, creating marked seasonal air quality contrast.
Today - 20 September | Pollution peaks at 09:00
AQI:
Moderate
41.8/100
PM2.5 (fine particles):
Moderate
41.8/100
PM10 (coarse particles):
Fair
28.0/100
NO2 (nitrogen dioxide):
Moderate
41.3/100
O3 (ozone):
Fair
37.3/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
1.0/100
HCHO (formaldehyde):
Good
8.6/100
PM1 (ultrafine particles):
Fair
22.3/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 17:00
AQI:
Fair
30.4/100
PM2.5 (fine particles):
Fair
20.8/100
PM10 (coarse particles):
Good
14.6/100
NO2 (nitrogen dioxide):
Fair
22.0/100
O3 (ozone):
Fair
30.4/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.7/100
HCHO (formaldehyde):
Good
4.9/100
PM1 (ultrafine particles):
Good
7.7/100
Pollen forecast in Annecy
View pollen forecastSports venues in Annecy
Frequently Asked Questions
Is air quality bad in Annecy right now?
On 20 September 2026, overall air quality in Annecy is moderate. AQI is the main air quality indicator at 41.8/100. Pollution peaks around 9:00 AM (PM2.5: 41.8/100).
Will air quality be worse tomorrow in Annecy?
On 21 September 2026, air quality conditions in Annecy will be better than today, with AQI forecast at fair at 30.4/100. Pollution peaks around 5:00 PM (O3: 30.4/100).
When is air pollution at its worst in Annecy?
In Annecy, the combination of valley motorway traffic and light industry and heavy birch and oak pollen in spring is what most affects sensitive groups; mountain valley winds alternate with calm temperature inversions, so poor conditions rarely last more than a couple of days. The presence of alpine valley pasture and orchards in the area adds another layer to the local pattern.
Are air quality levels in Annecy 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
Want to see air quality forecasts for other cities in France?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 20 September 2026 at 14:33 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.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.
Get the full experience in the Airmine app.