Worst air pollution Monterrey, today and tomorrow
Today (23 August): Air quality in Monterrey is poor. AQI, PM2.5, and PM10 are poor; O3 is fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 PM (PM10: 75.0/100).
Tomorrow (24 August 2026): Air quality in Monterrey is poor. PM2.5 decreases to moderate; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 6:00 AM (PM10: 77.0/100). 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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Monterrey's air quality reflects the Monterrey metropolitan area's severe topographic enclosure in the Sierra Madre Oriental mountain basin at 537 metres, with vehicle traffic on the Periférico Ecológico and the surrounding steel, glass, cement, and manufacturing corridor — Monterrey being Mexico's industrial capital — generating elevated industrial PM2.5 and SO₂. The surrounding mountain walls create complete topographic enclosure, while the Cerro de la Silla and Cerro de las Mitras create dramatic topography and Monterrey maintains among Mexico's more industrially challenging urban environments throughout the year.
Today - 23 August | Pollution peaks at 21:00
AQI:
Poor
75.0/100
PM2.5 (fine particles):
Poor
60.3/100
PM10 (coarse particles):
Poor
75.0/100
NO2 (nitrogen dioxide):
Good
0.8/100
O3 (ozone):
Fair
27.7/100
SO2 (sulfur dioxide):
Good
1.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
16.3/100
Levels show the poorest local air quality during the day
Tomorrow - 24 August | Pollution peaks at 06:00
AQI:
Poor
77.0/100
PM2.5 (fine particles):
Moderate
54.3/100
PM10 (coarse particles):
Poor
77.0/100
NO2 (nitrogen dioxide):
Good
0.2/100
O3 (ozone):
Good
19.4/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.8/100
PM1 (ultrafine particles):
Good
14.1/100
Frequently Asked Questions
Is air quality bad in Monterrey right now?
On 23 August 2026, overall air quality in Monterrey is poor. AQI is the main air quality indicator at 75.0/100. Pollution peaks around 9:00 PM (PM10: 75.0/100).
Will air quality be worse tomorrow in Monterrey?
On 24 August 2026, air quality conditions in Monterrey will be similar to today, with AQI forecast at poor at 77.0/100. Pollution peaks around 6:00 AM (PM10: 77.0/100).
When is air pollution at its worst in Monterrey?
The biggest local contributors to pollution in Monterrey are road traffic, heavy industry such as steel, cement, or petrochemical processing, as well as manufacturing and food processing, particularly once dry, windy weather picks up. Dust carried on these winds adds substantially to particulate levels. This is most noticeable during spring and autumn wind events.
Are air quality levels in Monterrey 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: 24 August 2026 at 02:28 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.
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