Worst air pollution Hermosillo, today and tomorrow
Today (9 August): Air quality in Hermosillo is fair. O3 is fair; AQI, PM2.5, and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (PM10: 42.9/100).
Tomorrow (10 August 2026): Air quality in Hermosillo is fair. AQI worsens to fair; PM2.5 increases to fair; PM10 increases to fair; all other pollutants stay as today. Pollution peaks around 4:00 PM (PM10: 35.9/100). Airmine updates local air quality forecasts four times daily.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Hermosillo's air quality reflects the flat Sonoran Desert plain at 215 metres, with vehicle traffic on surrounding roads and the maquiladora manufacturing, mining, and agricultural corridor contributing local sources. Windblown Sonoran Desert dust contributes elevated PM10 during dry dust storm events, while the flat semi-arid terrain generally allows reasonable dispersal and Hermosillo generally maintains moderate to good northwestern Mexican desert city readings throughout most of the year.
Today - 9 August | Pollution peaks at 17:00
AQI:
Medium
42.9/100
PM2.5 (fine particles):
Medium
40.1/100
PM10 (coarse particles):
Medium
42.9/100
NO2 (nitrogen dioxide):
Good
1.1/100
O3 (ozone):
Fair
24.8/100
SO2 (sulfur dioxide):
Good
2.3/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.1/100
PM1 (ultrafine particles):
Good
6.7/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 16:00
AQI:
Fair
35.9/100
PM2.5 (fine particles):
Fair
29.8/100
PM10 (coarse particles):
Fair
35.9/100
NO2 (nitrogen dioxide):
Good
1.1/100
O3 (ozone):
Fair
28.6/100
SO2 (sulfur dioxide):
Good
3.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
5.9/100
Frequently Asked Questions
Is air quality bad in Hermosillo right now?
On 9 August 2026, overall air quality in Hermosillo is fair. O3 is the main pollutant at 24.8/100. Pollution peaks around 5:00 PM (PM10: 42.9/100).
Will air quality be worse tomorrow in Hermosillo?
On 10 August 2026, air quality conditions in Hermosillo will be similar to today, with AQI forecast at fair at 35.9/100. Pollution peaks around 4:00 PM (PM10: 35.9/100).
When is air pollution at its worst in Hermosillo?
The biggest local contributors to pollution in Hermosillo are traffic on the surrounding roads, quarrying activity, together with light manufacturing, particularly once dry, windy weather picks up. Dust carried on these winds adds substantially to particulate levels. These episodes tend to cluster in spring and autumn.
Are air quality levels in Hermosillo 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.
Check air quality in other popular cities:
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.
Get the full experience in the Airmine app.