Worst air pollution Winterthur, today and tomorrow
Today (30 August): Air quality in Winterthur is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 AM (NO2: 27.6/100).
Tomorrow (31 August 2026): Air quality in Winterthur is fair. All pollutants stay as today. Pollution peaks around 1:00 AM (NO2: 28.7/100). 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.
Winterthur's air quality is generally good, benefiting from the Swiss Mittelland's position with the Jura hills channelling Atlantic westerlies and the Töss river valley providing natural ventilation. Vehicle traffic on the A1 motorway and the surrounding Sulzer and Georg Fischer industrial engineering operations contribute the primary local sources, while the Alpine Föhn wind periodically delivers exceptional clean mountain air from the south.
Today - 30 August | Pollution peaks at 01:00
AQI:
Fair
27.6/100
PM2.5 (fine particles):
Good
7.4/100
PM10 (coarse particles):
Good
2.2/100
NO2 (nitrogen dioxide):
Fair
27.6/100
O3 (ozone):
Fair
23.0/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.8/100
PM1 (ultrafine particles):
Good
8.8/100
Levels show the poorest local air quality during the day
Tomorrow - 31 August | Pollution peaks at 01:00
AQI:
Fair
28.7/100
PM2.5 (fine particles):
Good
8.8/100
PM10 (coarse particles):
Good
2.6/100
NO2 (nitrogen dioxide):
Fair
28.7/100
O3 (ozone):
Fair
25.6/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.3/100
PM1 (ultrafine particles):
Good
10.7/100
Pollen forecast in Winterthur
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Winterthur
Frequently Asked Questions
Is air quality bad in Winterthur right now?
On 30 August 2026, overall air quality in Winterthur is fair. AQI is the main air quality indicator at 27.6/100. Pollution peaks around 1:00 AM (NO2: 27.6/100).
Will air quality be worse tomorrow in Winterthur?
On 31 August 2026, air quality conditions in Winterthur will be similar to today, with AQI forecast at fair at 28.7/100. Pollution peaks around 1:00 AM (NO2: 28.7/100).
When is air pollution at its worst in Winterthur?
The worst stretch for air quality at Winterthur tends to be a calm winter morning, when vehicle traffic and dense urban activity gather along the lakeshore under a layer of cold, trapped air. Warmer months bring noticeably better airflow around the lake, with only the occasional summer ozone spike breaking an otherwise clean pattern through spring and autumn.
Are air quality levels in Winterthur 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 Switzerland?
Check air quality in other popular cities:
Data provided by Airmine — Last update: 30 August 2026 at 14:32 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.