34
Good · Dominant pollutant: Ozone (O₃)
Air quality is satisfactory; air pollution poses little or no risk.
The current Air Quality Index (AQI) in Montreal is 34, categorized as Good. Air quality is satisfactory; air pollution poses little or no risk.
Pollutants & conditions
| Measurement | Value |
|---|
| PM2.5 | 9 |
| Ozone (O₃) | 33.7 |
| Nitrogen Dioxide (NO₂) | 8.1 |
| Sulfur Dioxide (SO₂) | 1.1 |
| Carbon Monoxide (CO) | 6.4 |
| Temperature (°C) | 8.8 |
| Humidity (%) | 47.6 |
| Pressure (hPa) | 1029.8 |
| Wind (m/s) | 1 |
PM2.5 forecast
| Date | Avg | Min | Max |
|---|
| 2026-05-19 | 37 | 36 | 37 |
| 2026-05-20 | 21 | 4 | 44 |
| 2026-05-21 | 5 | 4 | 10 |
| 2026-05-22 | 16 | 7 | 32 |
| 2026-05-23 | 14 | 10 | 17 |
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