Worst air pollution St. Leonhard - Graz, today and tomorrow
Today (9 August): Air quality in St. Leonhard is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 2:00 PM (O3: 44.6/100).
Tomorrow (10 August 2026): Air quality in St. Leonhard is medium. All pollutants stay as today. Pollution peaks around 12:00 PM (O3: 51.3/100). Airmine updates local air quality forecasts four times daily.
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St. Leonhard's air quality benefits from the Stadtpark's green buffer in eastern Graz, though vehicle traffic on surrounding streets still contributes to the enclosed Graz basin's characteristic pollution challenges.
Today - 9 August | Pollution peaks at 14:00
AQI:
Medium
44.6/100
PM2.5 (fine particles):
Good
10.5/100
PM10 (coarse particles):
Good
2.9/100
NO2 (nitrogen dioxide):
Good
12.2/100
O3 (ozone):
Medium
44.6/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.0/100
PM1 (ultrafine particles):
Good
13.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 12:00
AQI:
Medium
51.3/100
PM2.5 (fine particles):
Good
10.5/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Good
19.2/100
O3 (ozone):
Medium
51.3/100
SO2 (sulfur dioxide):
Good
2.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
14.8/100
PM1 (ultrafine particles):
Good
11.4/100
Other Landmarks in Graz
Sports venues in Graz
Frequently Asked Questions
Is air quality bad in St. Leonhard right now?
On 9 August 2026, overall air quality in St. Leonhard is medium. AQI is the main air quality indicator at 44.6/100. Pollution peaks around 2:00 PM (O3: 44.6/100).
Will air quality be worse tomorrow in St. Leonhard?
On 10 August 2026, air quality conditions in St. Leonhard will be similar to today, with AQI forecast at medium at 51.3/100. Pollution peaks around 12:00 PM (O3: 51.3/100).
When is air pollution at its worst in St. Leonhard?
Air quality at St. Leonhard is typically worst on calm winter mornings, when vehicle traffic and legacy industry settle under a temperature inversion within the Mur River basin. Summer generally brings noticeably better dispersion, though hot, still afternoons can occasionally raise ozone. Spring and autumn tend to be the steadiest, cleanest stretches of the year.
Are air quality levels in St. Leonhard 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: 9 August 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.
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