Air Quality History for Longmont, United States
Historical PM2.5 and AQI trend from monitoring stations near Longmont, United States.
20
Current AQI
Good Station
Good Station
Air Quality Index Station
74hPM2.5 Station
74h · 1 stationTemperature GFS model
80ptPrecipitation GFS model
mm/dayDaily Summary Station
| Date | AQI | Range | PM2.5 avg | PM10 avg | Hours | Stations |
|---|---|---|---|---|---|---|
| 2026-06-09 | 2 | 2–2 | 0.4 µg/m³ | 2.0 | 1h | 1 |
| 2026-06-08 | 16 | 9–24 | 3.8 µg/m³ | 4.1 | 4h | 1 |
| 2026-06-07 | 4 | 4–5 | 1.0 µg/m³ | 1.0 | 4h | 1 |
| 2026-06-06 | 8 | 3–24 | 2.0 µg/m³ | 2.4 | 10h | 1 |
| 2026-06-05 | 8 | 6–11 | 1.8 µg/m³ | 1.8 | 4h | 1 |
| 2026-06-03 | 10 | 5–15 | 2.3 µg/m³ | 2.4 | 2h | 1 |
| 2026-06-02 | 7 | 1–21 | 1.6 µg/m³ | 2.2 | 6h | 1 |
| 2026-06-01 | 5 | 5–5 | 1.2 µg/m³ | 1.3 | 1h | 1 |
| 2026-05-29 | 23 | 2–43 | 5.5 µg/m³ | 6.6 | 8h | 1 |
| 2026-05-28 | 17 | 4–51 | 3.7 µg/m³ | 4.4 | 10h | 1 |
| 2026-05-27 | 2 | 2–2 | 0.5 µg/m³ | 1.0 | 1h | 1 |
| 2026-05-26 | 4 | 3–4 | 0.8 µg/m³ | 1.1 | 6h | 1 |
| 2026-05-23 | 15 | 11–19 | 3.7 µg/m³ | 4.2 | 2h | 1 |
| 2026-05-22 | 6 | 6–6 | 1.3 µg/m³ | 2.2 | 2h | 1 |
| 2026-05-21 | 24 | 6–38 | 5.7 µg/m³ | 6.0 | 6h | 1 |
| 2026-05-20 | 10 | 2–27 | 2.3 µg/m³ | 2.9 | 7h | 1 |