Worst air pollution San Miguel de Allende, today and tomorrow
Today (16 July): Air quality in San Miguel de Allende is poor. AQI and PM10 are poor; O3 is fair; PM2.5 is medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 AM (PM10: 78.0/100).
Tomorrow (17 July 2026): Air quality in San Miguel de Allende is poor. O3 decreases to good; all other pollutants stay as today. Pollution peaks around 5:00 AM (PM10: 61.1/100). 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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San Miguel de Allende's air quality benefits from its exceptional Guanajuato Bajío highland position at 1,910 metres, with consistent central Mexican plateau breezes providing background ventilation. Vehicle traffic on surrounding roads and the colonial heritage tourism, arts, and services corridor contribute modest local sources, while the elevated plateau position aids dispersal and San Miguel de Allende generally maintains among Mexico's more moderately ventilated major UNESCO colonial highland heritage city environments throughout most of the year.
Today - 16 July | Pollution peaks at 00:00
AQI:
Poor
78.0/100
PM2.5 (fine particles):
Medium
56.6/100
PM10 (coarse particles):
Poor
78.0/100
NO2 (nitrogen dioxide):
Good
0.6/100
O3 (ozone):
Fair
22.1/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.5/100
PM1 (ultrafine particles):
Good
13.8/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 05:00
AQI:
Poor
61.1/100
PM2.5 (fine particles):
Medium
44.0/100
PM10 (coarse particles):
Poor
61.1/100
NO2 (nitrogen dioxide):
Good
0.5/100
O3 (ozone):
Good
18.8/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.6/100
PM1 (ultrafine particles):
Good
8.2/100
Frequently Asked Questions
Is air quality bad in San Miguel de Allende right now?
On 16 July 2026, overall air quality in San Miguel de Allende is poor. AQI is the main air quality indicator at 78.0/100. Pollution peaks around 12:00 AM (PM10: 78.0/100).
Will air quality be worse tomorrow in San Miguel de Allende?
On 17 July 2026, air quality conditions in San Miguel de Allende will be similar to today, with AQI forecast at poor at 61.1/100. Pollution peaks around 5:00 AM (PM10: 61.1/100).
When is air pollution at its worst in San Miguel de Allende?
San Miguel de Allende usually sees its poorest air quality when traffic on the surrounding roads and seasonal tourism traffic coincide with periods when weather conditions turn unfavourable. Background emissions and local weather both shape how conditions change from day to day. Local weather patterns add further day-to-day variation.
Are air quality levels in San Miguel de Allende 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