Air Quality History for Longmont, United States
Historical PM2.5 and AQI trend from monitoring stations near Longmont, United States.
40
Current AQI
Good Station
Good Station
Air Quality Index Station
22hPM2.5 Station
22h · 1 stationTemperature GFS model
28ptPrecipitation GFS model
mm/dayDaily Summary Station
| Date | AQI | Range | PM2.5 avg | PM10 avg | Hours | Stations |
|---|---|---|---|---|---|---|
| 2026-07-22 | 16 | 15–16 | 3.7 µg/m³ | 4.0 | 2h | 1 |
| 2026-07-21 | 54 | 27–74 | 15.2 µg/m³ | 16.7 | 8h | 1 |
| 2026-07-20 | 4 | 2–5 | 0.8 µg/m³ | 1.8 | 2h | 1 |
| 2026-07-17 | 4 | 3–4 | 0.9 µg/m³ | 1.1 | 3h | 1 |
| 2026-07-16 | 5 | 4–7 | 0.9 µg/m³ | 1.7 | 4h | 1 |
| 2026-07-15 | 5 | 1–8 | 1.1 µg/m³ | 1.4 | 3h | 1 |