Worst air pollution Aarau, today and tomorrow
Today (16 July): Air quality in Aarau is fair. NO2 is fair; AQI and O3 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 44.5/100).
Tomorrow (17 July 2026): Air quality in Aarau is fair. PM2.5 increases to fair; NO2 decreases to medium; O3 increases to fair; PM1 increases to fair; all other pollutants stay as today. Pollution peaks around 5:00 AM (NO2: 41.3/100). 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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Aarau's air quality reflects its Aare river position at the Jura's edge, with vehicle traffic on the A1 motorway the primary local source amid the generally well-ventilated Aargau Mittelland terrain.
Today - 16 July | Pollution peaks at 15:00
AQI:
Medium
44.5/100
PM2.5 (fine particles):
Good
13.3/100
PM10 (coarse particles):
Good
5.1/100
NO2 (nitrogen dioxide):
Fair
34.2/100
O3 (ozone):
Medium
44.5/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
16.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 05:00
AQI:
Medium
41.3/100
PM2.5 (fine particles):
Fair
21.9/100
PM10 (coarse particles):
Good
7.0/100
NO2 (nitrogen dioxide):
Medium
41.3/100
O3 (ozone):
Fair
32.3/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.5/100
PM1 (ultrafine particles):
Fair
26.2/100
Pollen forecast in Aarau
View pollen forecastFrequently Asked Questions
Is air quality bad in Aarau right now?
On 16 July 2026, overall air quality in Aarau is fair. NO2 is the main pollutant at 34.2/100. Pollution peaks around 3:00 PM (O3: 44.5/100).
Will air quality be worse tomorrow in Aarau?
On 17 July 2026, air quality conditions in Aarau will be similar to today, with O3 forecast at fair at 32.3/100. Pollution peaks around 5:00 AM (NO2: 41.3/100).
When is air pollution at its worst in Aarau?
Aarau's poorest air quality shows up when winter calm lets vehicle traffic and cross-border industry accumulate across this flat, tri-national stretch rather than clearing out. Summer usually brings much better dispersion across the plain, aside from the odd ozone spike during a hot, still afternoon, with spring and autumn typically the steadiest months.
Are air quality levels in Aarau 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.
Want to see air quality forecasts for other cities in Switzerland?
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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