Worst air pollution Montebello, today and tomorrow
Today (15 July): Air quality in Montebello is fair. AQI, PM10, and O3 are fair; PM2.5, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 8:00 AM (O3: 31.2/100).
Tomorrow (16 July 2026): Air quality in Montebello is fair. All pollutants stay as today. Pollution peaks around 9:00 AM (O3: 29.9/100). 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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Montebello's air quality reflects the San Gabriel Valley's enclosed position in the Los Angeles basin, with vehicle emissions from I-60 and I-710 and the surrounding industrial and residential character generating elevated NOₓ and diesel PM2.5 from the adjacent rail freight corridor. The basin inversion traps all local emission sources throughout much of the year, while Montebello's position at the Los Angeles-San Gabriel Valley boundary tracks at consistently elevated suburban pollution levels throughout most of the year.
Today - 15 July | Pollution peaks at 08:00
AQI:
Fair
31.2/100
PM2.5 (fine particles):
Good
15.5/100
PM10 (coarse particles):
Fair
23.8/100
NO2 (nitrogen dioxide):
Good
0.3/100
O3 (ozone):
Fair
31.2/100
SO2 (sulfur dioxide):
Good
0.5/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
2.6/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 09:00
AQI:
Fair
29.9/100
PM2.5 (fine particles):
Good
14.3/100
PM10 (coarse particles):
Fair
24.5/100
NO2 (nitrogen dioxide):
Good
0.6/100
O3 (ozone):
Fair
29.9/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
2.8/100
Pollen forecast in Montebello
View pollen forecastFrequently Asked Questions
Is air quality bad in Montebello right now?
On 15 July 2026, overall air quality in Montebello is fair. AQI is the main air quality indicator at 31.2/100. Pollution peaks around 8:00 AM (O3: 31.2/100).
Will air quality be worse tomorrow in Montebello?
On 16 July 2026, air quality conditions in Montebello will be similar to today, with AQI forecast at fair at 29.9/100. Pollution peaks around 9:00 AM (O3: 29.9/100).
When is air pollution at its worst in Montebello?
Conditions in Montebello vary noticeably across the seasons. In short, the cleanest air usually comes in winter, when storms periodically flush pollution out of the basin, whereas from August into October, wildfire smoke can add sharp particulate spikes on top of the usual summer ozone. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Montebello 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