1. North America
  2. United States
  3. Colorado
  4. Boulder County
  5. Longmont

Longmont

Boulder County, Colorado

2026-05-09 18:00
AQI (US)
Good
Pollutants|Pollens
PM2.5
μg/m³
4.9
PM10
μg/m³
19
Weather
  • ℃
  • ℉
25℃
21%
22 kph
8 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • Pollen
  • PM2.5
  • PM10
Places included
Longmont
AQI 28
Data Sources
http://www.airnow.gov/

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Cities Nearby

Longmont
AQI 28
Niwot
AQI 28
Gunbarrel
AQI 23
Erie
AQI 28
Firestone
AQI 23
Lyons
AQI 28
Frederick
AQI 23
Dacono
AQI 28
Lafayette
AQI 23
Louisville
AQI 97
Boulder
AQI 82