Montreal air quality today
Air quality in Montreal is currently good, with a European index of 37. The concentration of PM2.5 particles is 5 µg/m³ and PM10 is 5 µg/m³. The air is good and safe to spend time outdoors. Over the next 24 hours the air will be cleanest around 4:00 AM (index 23) and most polluted around 9:00 PM (index 62).
Current air quality in Montreal
Good
37EAQI
The air is good and safe to spend time outdoors.
- PM2.5
- 5 µg/m³
- PM10
- 5 µg/m³
- Ozone
- 31 µg/m³
Model estimate (Open-Meteo / CAMS) for the city location. It may differ from readings at local stations.
The next 24 hours at a glance
- Index now
- 37
- Good
- Average index
- 38
- Good
- Cleanest air
- 4:00 AM
- index 23
- Most polluted hour
- 9:00 PM
- index 62
- PM2.5
- 5 µg/m³
- PM10
- 5 µg/m³
Air quality in Montreal by the hour
- 37Now
- 302 AM
- 253 AM
- 234 AM
- 245 AM
- 296 AM
- 367 AM
- 408 AM
- 389 AM
- 3210 AM
- 2811 AM
- 2512 PM
- 231 PM
- 232 PM
- 253 PM
- 294 PM
- 385 PM
- 466 PM
- 557 PM
- 618 PM
- 629 PM
- 6010 PM
- 5811 PM
- 5712 AM
European Air Quality Index (EAQI) by the hour, a model estimate. A shorter bar means cleaner air.
Pollen in Montreal
Pollen data is not available for this location. The pollen model only covers Europe.
Frequently asked questions
How is the air quality in Montreal today?
It is currently good (European index 37). PM2.5 is 5 µg/m³, PM10 is 5 µg/m³ and ozone is 31 µg/m³. The average for the next 24 hours is around 38.
What does the European Air Quality Index (EAQI) mean?
The EAQI is a scale used by the European Environment Agency. Up to 20 is excellent air, up to 40 good, up to 60 moderate, up to 80 poor, up to 100 very poor, and above 100 extremely poor. The index is calculated from the concentration of fine particles (PM2.5 and PM10), ozone, nitrogen dioxide and sulphur dioxide.
What are PM2.5 and PM10 particles?
They are tiny particles in the air with a diameter of up to 2.5 and 10 micrometres. They come from traffic, heating and industry, and there are the most of them in winter, on calm days without wind or rain. PM2.5 is more dangerous because it penetrates deep into the lungs.
Are these measurements or estimates?
This is an atmospheric model estimate (Open-Meteo / CAMS) for the city location, not a reading from a local station. Values may therefore differ from station data in some parts of the city.
When is the air cleanest?
The air is usually cleaner during stronger winds, after rain and in the afternoon, when the cold layer near the ground breaks up. It is worst early in the morning and in the evening in the cold part of the year, when heating and traffic increase.