Worst air pollution Morelia, today and tomorrow
Today (9 August): Air quality in Morelia is poor. AQI and PM10 are poor; PM2.5 is medium; NO2, O3, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 PM (PM10: 67.1/100).
Tomorrow (10 August 2026): Air quality in Morelia is medium. AQI improves to medium; PM10 decreases to medium; all other pollutants stay as today. Pollution peaks around 10:00 PM (PM10: 53.3/100). 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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Morelia's air quality reflects the Michoacán Guayangareo Valley's enclosed basin at 1,921 metres, with vehicle traffic on surrounding roads and the agri-food, services, and government corridor contributing local sources. The valley's modest topographic enclosure creates concentration under inversions, while the elevated altitude worsens photochemical ozone formation and Morelia generally maintains moderate Mexican highland provincial capital readings throughout most of the year.
Today - 9 August | Pollution peaks at 18:00
AQI:
Poor
67.1/100
PM2.5 (fine particles):
Medium
51.9/100
PM10 (coarse particles):
Poor
67.1/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Good
20.0/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.5/100
PM1 (ultrafine particles):
Good
9.9/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 22:00
AQI:
Medium
53.3/100
PM2.5 (fine particles):
Medium
45.2/100
PM10 (coarse particles):
Medium
53.3/100
NO2 (nitrogen dioxide):
Good
0.0/100
O3 (ozone):
Good
18.5/100
SO2 (sulfur dioxide):
Good
0.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.9/100
PM1 (ultrafine particles):
Good
8.5/100
Frequently Asked Questions
Is air quality bad in Morelia right now?
On 9 August 2026, overall air quality in Morelia is poor. AQI is the main air quality indicator at 67.1/100. Pollution peaks around 6:00 PM (PM10: 67.1/100).
Will air quality be worse tomorrow in Morelia?
On 10 August 2026, air quality conditions in Morelia will be better than today, with AQI forecast at medium at 53.3/100. Pollution peaks around 10:00 PM (PM10: 53.3/100).
When is air pollution at its worst in Morelia?
Pollution in Morelia typically rises when traffic emissions together with petrochemical and refining operations combine, especially once temperature inversions set in over the valley. Topographic enclosure in the valley lets pollution accumulate rather than clear out. Heat and sunlight combine with emissions to form ozone at ground level.
Are air quality levels in Morelia 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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