Worst air pollution Guadalajara, today and tomorrow
Today (21 July): Air quality in Guadalajara is fair. PM2.5 and O3 are fair; AQI and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 PM (PM10: 42.3/100).
Tomorrow (22 July 2026): Air quality in Guadalajara is fair. PM2.5 decreases to medium; all other pollutants stay as today. Pollution peaks around 7:00 AM (PM10: 57.1/100). 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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Guadalajara's air quality reflects Mexico's second city in the Atemajac Valley's partial topographic enclosure at 1,566 metres, with vehicle traffic on the Periferico and the surrounding manufacturing, electronics, and automotive corridor contributing local sources. The valley's topographic enclosure concentrates emissions under inversions, while the elevated altitude worsens ozone formation and Guadalajara's combination of vehicle density and valley topography makes it one of Mexico's more challenging provincial metropolitan air quality environments throughout the year.
Today - 21 July | Pollution peaks at 12:00
AQI:
Medium
42.3/100
PM2.5 (fine particles):
Fair
27.1/100
PM10 (coarse particles):
Medium
42.3/100
NO2 (nitrogen dioxide):
Good
0.4/100
O3 (ozone):
Fair
28.8/100
SO2 (sulfur dioxide):
Good
0.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.8/100
PM1 (ultrafine particles):
Good
4.1/100
Levels show the poorest local air quality during the day
Tomorrow - 22 July | Pollution peaks at 07:00
AQI:
Medium
57.1/100
PM2.5 (fine particles):
Medium
41.4/100
PM10 (coarse particles):
Medium
57.1/100
NO2 (nitrogen dioxide):
Good
0.4/100
O3 (ozone):
Fair
30.8/100
SO2 (sulfur dioxide):
Good
0.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.7/100
PM1 (ultrafine particles):
Good
6.0/100
Frequently Asked Questions
Is air quality bad in Guadalajara right now?
On 21 July 2026, overall air quality in Guadalajara is fair. O3 is the main pollutant at 28.8/100. Pollution peaks around 12:00 PM (PM10: 42.3/100).
Will air quality be worse tomorrow in Guadalajara?
On 22 July 2026, air quality conditions in Guadalajara will be similar to today, with O3 forecast at fair at 30.8/100. Pollution peaks around 7:00 AM (PM10: 57.1/100).
When is air pollution at its worst in Guadalajara?
In Guadalajara, vehicle traffic and light manufacturing are the main local sources, with conditions worsening when temperature inversions set in over the valley. Topographic enclosure in the valley lets pollution accumulate rather than clear out. Photochemical reactions in the heat push ozone levels higher.
Are air quality levels in Guadalajara 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: 21 July 2026 at 16:20 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