Worst air pollution Yucaipa, today and tomorrow
Today (15 July): Air quality in Yucaipa is fair. AQI, PM2.5, PM10, and O3 are fair; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 11:00 AM (PM10: 31.7/100).
Tomorrow (16 July 2026): Air quality in Yucaipa is fair. All pollutants stay as today. Pollution peaks around 5:00 AM (PM10: 32.7/100). 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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Yucaipa's air quality reflects the Inland Empire's San Bernardino Valley partial topographic enclosure, with vehicle emissions from I-10 the primary local source. The Yucaipa Valley's position at the eastern basin edge means it sits between the concentrated Inland Empire pollution basin and the cleaner San Bernardino mountain backdrop, while the afternoon Banning Pass winds occasionally flush basin pollution eastward and temperature inversions during calm periods concentrate all local and upwind vehicle and freight emissions.
Today - 15 July | Pollution peaks at 11:00
AQI:
Fair
31.7/100
PM2.5 (fine particles):
Fair
21.6/100
PM10 (coarse particles):
Fair
31.7/100
NO2 (nitrogen dioxide):
Good
1.9/100
O3 (ozone):
Fair
31.2/100
SO2 (sulfur dioxide):
Good
3.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
0.9/100
PM1 (ultrafine particles):
Good
3.7/100
Levels show the poorest local air quality during the day
Tomorrow - 16 July | Pollution peaks at 05:00
AQI:
Fair
32.7/100
PM2.5 (fine particles):
Fair
20.1/100
PM10 (coarse particles):
Fair
32.7/100
NO2 (nitrogen dioxide):
Good
3.8/100
O3 (ozone):
Fair
29.9/100
SO2 (sulfur dioxide):
Good
6.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.0/100
PM1 (ultrafine particles):
Good
4.0/100
Pollen forecast in Yucaipa
View pollen forecastFrequently Asked Questions
Is air quality bad in Yucaipa right now?
On 15 July 2026, overall air quality in Yucaipa is fair. AQI is the main air quality indicator at 31.7/100. Pollution peaks around 11:00 AM (PM10: 31.7/100).
Will air quality be worse tomorrow in Yucaipa?
On 16 July 2026, air quality conditions in Yucaipa will be similar to today, with AQI forecast at fair at 32.7/100. Pollution peaks around 5:00 AM (PM10: 32.7/100).
When is air pollution at its worst in Yucaipa?
Air quality in Yucaipa shifts across the year — the cleanest air usually comes in winter, when storms periodically flush pollution out of the basin, whereas hot, sunny summer conditions drive persistent ozone problems, compounded by wildfire smoke risk into early autumn. Coastal breezes offer some relief compared to inland valley locations that see heavier smog buildup.
Are air quality levels in Yucaipa 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