Worst air pollution Medellín, today and tomorrow
Today (9 August): Air quality in Medellín is good. AQI, PM2.5, PM10, NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (O3: 19.3/100).
Tomorrow (10 August 2026): Air quality in Medellín is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 11:00 AM (O3: 21.9/100). 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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Medellín's air quality reflects the Aburrá Valley's severe topographic enclosure between the western and central Andes cordilleras at 1,495 metres, with vehicle traffic on the surrounding expressways and the extraordinary valley population density, manufacturing, and construction generating elevated PM2.5. The enclosed valley's persistent thermal inversions trap emissions extensively, while the surrounding Andean ridgelines create near-complete topographic enclosure and Medellín maintains among South America's more topographically challenged major metropolitan air quality environments throughout most of the year.
Today - 9 August | Pollution peaks at 11:00
AQI:
Good
19.3/100
PM2.5 (fine particles):
Good
7.6/100
PM10 (coarse particles):
Good
2.8/100
NO2 (nitrogen dioxide):
Good
4.3/100
O3 (ozone):
Good
19.3/100
SO2 (sulfur dioxide):
Good
3.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.6/100
PM1 (ultrafine particles):
Good
5.1/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 11:00
AQI:
Fair
21.9/100
PM2.5 (fine particles):
Good
9.2/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Good
6.5/100
O3 (ozone):
Fair
21.9/100
SO2 (sulfur dioxide):
Good
5.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
13.4/100
PM1 (ultrafine particles):
Good
7.0/100
Frequently Asked Questions
Is air quality bad in Medellín right now?
On 9 August 2026, overall air quality in Medellín is good. AQI is the main air quality indicator at 19.3/100. Pollution peaks around 11:00 AM (O3: 19.3/100).
Will air quality be worse tomorrow in Medellín?
On 10 August 2026, air quality conditions in Medellín will be worse than today, with AQI forecast at fair at 21.9/100. Pollution peaks around 11:00 AM (O3: 21.9/100).
When is air pollution at its worst in Medellín?
The biggest local contributors to pollution in Medellín are traffic emissions, textile and manufacturing operations, together with construction dust, particularly once calm, stagnant conditions settle in the surrounding valley. The bowl-like terrain here limits how quickly pollutants can escape. The effect is strongest during the colder months, when inversions set in most often.
Are air quality levels in Medellín 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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