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  2. United States
  3. Colorado
  4. Boulder County
  5. Longmont

Longmont

Boulder County, Colorado

2026-05-09 17:00
AQI (US)
Good
Pollutants|Pollens
PM2.5
μg/m³
6.8
PM10
μg/m³
13
Weather
  • ℃
  • ℉
24℃
23%
22 kph
9 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • PM2.5
  • PM10
Places included
Longmont
AQI 38
Data Sources
http://www.airnow.gov/

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Cities Nearby

Longmont
AQI 38
Niwot
AQI 38
Gunbarrel
AQI 18
Erie
AQI 38
Firestone
AQI 26
Lyons
AQI 38
Frederick
AQI 26
Dacono
AQI 38
Lafayette
AQI 18
Louisville
AQI 82
Boulder
AQI 76