The current Air Quality Index (AQI) in Chicago is 11, categorized as Good. Air quality is satisfactory; air pollution poses little or no risk.
| Measurement | Value |
|---|---|
| PM2.5 | 11 |
| Temperature (°C) | -17.7 |
| Date | Avg | Min | Max |
|---|---|---|---|
| 2026-05-19 | 16 | 14 | 20 |
| 2026-05-20 | 7 | 5 | 15 |
| 2026-05-21 | 9 | 5 | 19 |
| 2026-05-22 | 22 | 14 | 35 |
| 2026-05-23 | 50 | 33 | 64 |