Worst air pollution Stephansdom - Vienna, today and tomorrow
Today (9 August): Air quality in Stephansdom is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 4:00 PM (O3: 49.3/100).
Tomorrow (10 August 2026): Air quality in Stephansdom is poor. AQI worsens to poor; O3 increases to poor; all other pollutants stay as today. Pollution peaks around 12:00 PM (O3: 61.2/100). 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.
Stephansdom's air quality reflects Vienna's most pedestrianised square, with vehicle access restricted while surrounding tourist foot traffic and nearby streets still contribute background urban emissions to this central landmark.
Today - 9 August | Pollution peaks at 16:00
AQI:
Medium
49.3/100
PM2.5 (fine particles):
Good
7.6/100
PM10 (coarse particles):
Good
2.2/100
NO2 (nitrogen dioxide):
Good
10.7/100
O3 (ozone):
Medium
49.3/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.0/100
PM1 (ultrafine particles):
Good
9.4/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 12:00
AQI:
Poor
61.2/100
PM2.5 (fine particles):
Good
7.0/100
PM10 (coarse particles):
Good
3.0/100
NO2 (nitrogen dioxide):
Good
10.6/100
O3 (ozone):
Poor
61.2/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.4/100
PM1 (ultrafine particles):
Good
7.7/100
Other Landmarks in Vienna
Sports venues in Vienna
Frequently Asked Questions
Is air quality bad in Stephansdom right now?
On 9 August 2026, overall air quality in Stephansdom is medium. AQI is the main air quality indicator at 49.3/100. Pollution peaks around 4:00 PM (O3: 49.3/100).
Will air quality be worse tomorrow in Stephansdom?
On 10 August 2026, air quality conditions in Stephansdom will be worse than today, with AQI forecast at poor at 61.2/100. Pollution peaks around 12:00 PM (O3: 61.2/100).
When is air pollution at its worst in Stephansdom?
Stephansdom's air quality is at its poorest on calm winter mornings, when vehicle traffic and residential heating across the city get trapped close to the ground by the Danube basin's inversion tendency. Warmer months bring stronger airflow and generally cleaner conditions, aside from the occasional ozone spike during a heatwave. Spring and autumn are usually the most reliable for clean air.
Are air quality levels in Stephansdom 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 Austria?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 10 August 2026 at 02:34 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.
Get the full experience in the Airmine app.