Worst air pollution Fort Collins, today and tomorrow
Today (16 July): Air quality in Fort Collins is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 7:00 AM (O3: 36.2/100).
Tomorrow (17 July 2026): Air quality in Fort Collins is fair. All pollutants stay as today. Pollution peaks around 7:00 AM (O3: 38.9/100). 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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Fort Collins' air quality benefits from its Front Range position at 1,525 metres, with clean Rocky Mountain westerly airflows providing generally good ventilation across this northern Colorado university city. The primary concerns are seasonal wildfire smoke from Colorado and Wyoming forests and occasional winter inversions along the Front Range urban corridor, while vehicle emissions from US-287 and I-25 contribute the primary sustained local source throughout the year.
Today - 16 July | Pollution peaks at 07:00
AQI:
Fair
36.2/100
PM2.5 (fine particles):
Good
8.8/100
PM10 (coarse particles):
Good
7.2/100
NO2 (nitrogen dioxide):
Good
0.9/100
O3 (ozone):
Fair
36.2/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.4/100
PM1 (ultrafine particles):
Good
4.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 07:00
AQI:
Fair
38.9/100
PM2.5 (fine particles):
Good
7.7/100
PM10 (coarse particles):
Good
4.2/100
NO2 (nitrogen dioxide):
Good
1.0/100
O3 (ozone):
Fair
38.9/100
SO2 (sulfur dioxide):
Good
0.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.7/100
PM1 (ultrafine particles):
Good
4.5/100
Pollen forecast in Fort Collins
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Fort Collins
Frequently Asked Questions
Is air quality bad in Fort Collins right now?
On 16 July 2026, overall air quality in Fort Collins is fair. AQI is the main air quality indicator at 36.2/100. Pollution peaks around 7:00 AM (O3: 36.2/100).
Will air quality be worse tomorrow in Fort Collins?
On 17 July 2026, air quality conditions in Fort Collins will be similar to today, with AQI forecast at fair at 38.9/100. Pollution peaks around 7:00 AM (O3: 38.9/100).
When is air pollution at its worst in Fort Collins?
Like most US cities, Fort Collins sees air quality shift from season to season, as the shoulder seasons of spring and fall typically offer the most stable, cleanest conditions; by contrast, wildfire smoke drifting in from across the region is the main summer concern, while winter inversions can trap pollution locally. Valley and basin locations are especially prone to these winter inversion episodes compared to more exposed, higher terrain.
Are air quality levels in Fort Collins 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