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

Longmont

Boulder County, Colorado

2025-12-09 21:00
AQI (US)
Good
Pollutants|Pollens
PM2.5
μg/m³
2.2
PM10
μg/m³
6
Weather
  • ℃
  • ℉
16℃
34%
23 kph
1 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • PM2.5
  • PM10
Places included
Longmont
AQI 13
Data Sources
http://www.airnow.gov/

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Cities Nearby

Longmont
AQI 13
Niwot
AQI 14
Gunbarrel
AQI 6
Erie
AQI 14
Firestone
AQI 12
Lyons
AQI 14
Frederick
AQI 12
Dacono
AQI 14
Lafayette
AQI 6
Louisville
AQI 43
Boulder
AQI 41