Montreal Air Pollution: Real-time Air Quality Index (AQI)

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Montreal AQI: Montreal Real-time Air Quality Index (AQI).
44
Good
Updated on Tuesday 1:00
temperature: 13°C
currentpast 2 daysminmax
PM2.5 AQI
44Montreal PM25 (fine particulate matter) measured by Ville de Montreal - Réseau de surveillance de la qualité de l air. Values are converted to the US EPA AQI standard.944
O3 AQI
7Montreal O3 (ozone) measured by Ville de Montreal - Réseau de surveillance de la qualité de l air. Values are converted to the US EPA AQI standard.732
NO2 AQI
22Montreal NO2 (nitrogen dioxide) measured by Ville de Montreal - Réseau de surveillance de la qualité de l air. Values are converted to the US EPA AQI standard.426
SO2 AQI
5Montreal SO2 (sulfur dioxide) measured by Ville de Montreal - Réseau de surveillance de la qualité de l air. Values are converted to the US EPA AQI standard.515
CO AQI
-Montreal CO (carbon monoxide) measured by Ville de Montreal - Réseau de surveillance de la qualité de l air. Values are converted to the US EPA AQI standard.66
Temp.
14Montreal t (temp.) measured by : • Citizen Weather Observer Program (CWOP/APRS) • Weather Underground.420
Dew
-Montreal d (dew) measured by : • Citizen Weather Observer Program (CWOP/APRS) • Weather Underground.19
Pressure
1024Montreal p (pressure:) measured by : • Citizen Weather Observer Program (CWOP/APRS) • Weather Underground.10191031
Humidity
59Montreal h (humidity) measured by : • Citizen Weather Observer Program (CWOP/APRS) • Weather Underground.2268
Wind
0Montreal w (wind) measured by : • Citizen Weather Observer Program (CWOP/APRS) • Weather Underground.07
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Air Quality Forecast
TUE 13
22°C
9°C
WED 14
23°C
13°C
THU 15
23°C
15°C
FRI 16
24°C
16°C
SAT 17
19°C
13°C
PM2.5
Tuesday 13Wednesday 14Thursday 15Friday 16Saturday 17
hour
0369121518210369121518210369121518210369121518210369121518
Wind Speed (m/s)
566644453334345455321232221224556433456







































Temp.
14°11°10°15°20°22°20°18°15°13°13°17°20°23°21°18°16°15°15°18°22°21°18°17°16°16°16°19°23°20°19°18°16°14°14°18°19°18°16°
relative humidity
6268644842506377868577686351707478898977647693939610098866894949495958967758179
barometric pressure
102310241024102410221020101810191020102010201020101810171016101610151014101410131011100910081008100610051005100410021001100110021001100210031003100210021002
total precipitation
0.81.30.12.22.70.12.36.40.10.10.20.91.3
UVI:
7


5:28 ~ 20:15
UVI:
7


5:27 ~ 20:16
UVI:
5


5:25 ~ 20:17
UVI:
6


5:24 ~ 20:19
UVI:
1


5:23 ~ 20:20
Forecast plotted using timezone -04:00
Latest forecast updates:
Wind: 8 hours ago [May 12, 2025 11:12 PM]
fine particulate matter: 18 hours ago [May 12, 2025 1:35 PM]
ozone: a month ago [Mar 30, 2025 8:39 PM]
click to view the detailed forecast

Air Quality Data provided by: Ville de Montreal - Réseau de surveillance de la qualité de l'air (ville.montreal.qc.ca) and the Weather Underground (wunderground.com)

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This air quality monitoring station real-time data can be programmatically accessed using this API url: (For more information, check the API page:aqicn.org/api/ )

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About the Air Quality and Pollution Measurement:

About the Air Quality Levels

AQIAir Pollution LevelHealth ImplicationsCautionary Statement (for PM2.5)
0 - 50GoodAir quality is considered satisfactory, and air pollution poses little or no riskNone
51 -100ModerateAir quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
101-150Unhealthy for Sensitive GroupsMembers of sensitive groups may experience health effects. The general public is not likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
151-200UnhealthyEveryone may begin to experience health effects; members of sensitive groups may experience more serious health effectsActive children and adults, and people with respiratory disease, such as asthma, should avoid prolonged outdoor exertion; everyone else, especially children, should limit prolonged outdoor exertion
201-300Very UnhealthyHealth warnings of emergency conditions. The entire population is more likely to be affected.Active children and adults, and people with respiratory disease, such as asthma, should avoid all outdoor exertion; everyone else, especially children, should limit outdoor exertion.
300+HazardousHealth alert: everyone may experience more serious health effectsEveryone should avoid all outdoor exertion

To know more about Air Quality and Pollution, check the wikipedia Air Quality topic or the airnow guide to Air Quality and Your Health.

For very useful health advices of Beijing Doctor Richard Saint Cyr MD, check www.myhealthbeijing.com blog.


Usage Notice: All the Air Quality data are unvalidated at the time of publication, and due to quality assurance these data may be amended, without notice, at any time. The World Air Quality Index project has exercised all reasonable skill and care in compiling the contents of this information and under no circumstances will the World Air Quality Index project team or its agents be liable in contract, tort or otherwise for any loss, injury or damage arising directly or indirectly from the supply of this data.



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