Worst air pollution Weissfluhjoch - Davos, today and tomorrow
Today (20 September): Air quality in Weissfluhjoch is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (O3: 35.9/100).
Tomorrow (21 September 2026): Air quality in Weissfluhjoch is moderate. AQI worsens to moderate; PM2.5 increases to fair; O3 increases to moderate; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 41.9/100). Airmine updates local air quality forecasts four times daily.
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Weissfluhjoch's air quality benefits from its elevated position above the Davos valley floor, home to a snow research institute, with cable car visitor traffic the only significant local source.
Today - 20 September | Pollution peaks at 18:00
AQI:
Fair
35.9/100
PM2.5 (fine particles):
Good
18.0/100
PM10 (coarse particles):
Good
8.7/100
NO2 (nitrogen dioxide):
Good
16.5/100
O3 (ozone):
Fair
35.9/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
1.9/100
PM1 (ultrafine particles):
Good
4.9/100
Levels show the poorest local air quality during the day
Tomorrow - 21 September | Pollution peaks at 16:00
AQI:
Moderate
41.9/100
PM2.5 (fine particles):
Fair
23.8/100
PM10 (coarse particles):
Good
10.5/100
NO2 (nitrogen dioxide):
Good
10.3/100
O3 (ozone):
Moderate
41.9/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.6/100
HCHO (formaldehyde):
Good
2.2/100
PM1 (ultrafine particles):
Good
7.5/100
Other Landmarks in Davos
Sports venues in Davos
Frequently Asked Questions
Is air quality bad in Weissfluhjoch right now?
On 20 September 2026, overall air quality in Weissfluhjoch is fair. AQI is the main air quality indicator at 35.9/100. Pollution peaks around 6:00 PM (O3: 35.9/100).
Will air quality be worse tomorrow in Weissfluhjoch?
On 21 September 2026, air quality conditions in Weissfluhjoch will be worse than today, with AQI forecast at moderate at 41.9/100. Pollution peaks around 4:00 PM (O3: 41.9/100).
When is air pollution at its worst in Weissfluhjoch?
Weissfluhjoch sees almost no meaningful dip in air quality year-round, owing to its high, sparsely developed setting. The only modest exception is peak-season seasonal tourist and cable car traffic, which briefly adds a small local bump. Outside those windows, thin mountain air keeps conditions consistently among the best recorded anywhere in the country.
Are air quality levels in Weissfluhjoch 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.
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Data provided by Airmine — Last update: 20 September 2026 at 20:27 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.
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