Worst air pollution Ljubljana, today and tomorrow
Today (16 July): Air quality in Ljubljana 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: 46.5/100).
Tomorrow (17 July 2026): Air quality in Ljubljana is medium. All pollutants stay as today. Pollution peaks around 6:00 PM (O3: 52.5/100). 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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Ljubljana's air quality faces significant winter challenges, with the city's enclosed Ljubljana basin surrounded by the Julian Alps, Kamnik-Savinja Alps, and Kočevski Rog ridgelines creating one of central Europe's most pronounced topographic pollution traps. Residential wood burning and vehicle traffic on the A1 motorway generate elevated PM2.5 under frequent winter inversions, while summer conditions are considerably better with reasonable Alpine ventilation.
Today - 16 July | Pollution peaks at 14:00
AQI:
Medium
46.5/100
PM2.5 (fine particles):
Good
7.1/100
PM10 (coarse particles):
Good
2.3/100
NO2 (nitrogen dioxide):
Good
12.1/100
O3 (ozone):
Medium
46.5/100
SO2 (sulfur dioxide):
Good
0.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.2/100
PM1 (ultrafine particles):
Good
9.2/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 18:00
AQI:
Medium
52.5/100
PM2.5 (fine particles):
Good
11.5/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Good
15.7/100
O3 (ozone):
Medium
52.5/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
12.7/100
PM1 (ultrafine particles):
Good
15.7/100
Pollen forecast in Ljubljana
View pollen forecastSports venues in Ljubljana
Frequently Asked Questions
Is air quality bad in Ljubljana right now?
On 16 July 2026, overall air quality in Ljubljana is medium. AQI is the main air quality indicator at 46.5/100. Pollution peaks around 2:00 PM (O3: 46.5/100).
Will air quality be worse tomorrow in Ljubljana?
On 17 July 2026, air quality conditions in Ljubljana will be similar to today, with AQI forecast at medium at 52.5/100. Pollution peaks around 6:00 PM (O3: 52.5/100).
When is air pollution at its worst in Ljubljana?
Residents in Ljubljana are likeliest to notice reduced air quality when local combined tree and grass pollen peaks, or due to the city's enclosed Ljubljana basin surrounded by the Julian Alps, Kamnik-Savinja Alps, and Kočevski Rog ridgelines; a change of season or a spell of wind usually clears things up again.
Are air quality levels in Ljubljana 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.
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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