Worst air pollution Guanajuato, today and tomorrow
Today (16 July): Air quality in Guanajuato is very poor. AQI and PM10 are very poor; PM2.5 is poor; O3 is fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 1:00 AM (PM10: 100/100).
Tomorrow (17 July 2026): Air quality in Guanajuato is poor. AQI improves to poor; PM2.5 decreases to medium; PM10 decreases to poor; O3 decreases to good; all other pollutants stay as today. Pollution peaks around 4:00 AM (PM10: 77.0/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Guanajuato's air quality reflects the historic Bajío highland's deeply enclosed Guanajuato River canyon at 2,012 metres, with vehicle traffic on the surrounding winding narrow historic roads and the UNESCO heritage tourism, silver mining legacy, and university corridor contributing local sources. The canyon's near-complete topographic enclosure creates concentration under calm conditions, while the elevated position aids summer dispersal and the extraordinary colonial canyon city setting creates distinctive air quality dynamics throughout most of the year.
Today - 16 July | Pollution peaks at 01:00
AQI:
Very poor
100/100
PM2.5 (fine particles):
Poor
65.6/100
PM10 (coarse particles):
Very poor
100/100
NO2 (nitrogen dioxide):
Good
0.9/100
O3 (ozone):
Fair
23.3/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.4/100
PM1 (ultrafine particles):
Good
17.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 04:00
AQI:
Poor
77.0/100
PM2.5 (fine particles):
Medium
49.3/100
PM10 (coarse particles):
Poor
77.0/100
NO2 (nitrogen dioxide):
Good
0.7/100
O3 (ozone):
Good
18.7/100
SO2 (sulfur dioxide):
Good
1.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.4/100
PM1 (ultrafine particles):
Good
10.3/100
Frequently Asked Questions
Is air quality bad in Guanajuato right now?
On 16 July 2026, overall air quality in Guanajuato is very poor. AQI is the main air quality indicator at 100/100. Pollution peaks around 1:00 AM (PM10: 100/100).
Will air quality be worse tomorrow in Guanajuato?
On 17 July 2026, air quality conditions in Guanajuato will be better than today, with AQI forecast at poor at 77.0/100. Pollution peaks around 4:00 AM (PM10: 77.0/100).
When is air pollution at its worst in Guanajuato?
In Guanajuato, traffic on the surrounding roads, quarrying activity, as well as seasonal tourism traffic are the main local sources, with conditions worsening when winds are light and dispersion is poor. Local weather patterns add further variation on top of these sources. Local weather patterns add further day-to-day variation.
Are air quality levels in Guanajuato 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