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  5. Longmont

Longmont

Boulder County, Colorado

2026-09-25 10:00
CAQI (Europe)
Very Low
Pollutants|Pollens
PM2.5
μg/m³
4.2
PM10
μg/m³
6
Weather
  • ℃
  • ℉
13℃
85%
3 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • CAQI (Europe)
  • Pollen
  • PM2.5
  • PM10
Places included
Longmont
AQI 7
Data Sources
http://www.airnow.gov/

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Cities Nearby

Longmont
AQI 7
Niwot
AQI 7
Gunbarrel
AQI 6
Erie
AQI 7
Firestone
AQI 9
Lyons
AQI 7
Frederick
AQI 9
Dacono
AQI 20
Lafayette
AQI 6
Louisville
AQI 25
Boulder
AQI 19