Air Quality in Saint-Léonard, Canada

Drizzle
15.6°C · 83.6% humidity
15.6°
Feels 15.6°
15
Good
Air quality is satisfactory. Enjoy outdoor activities.
11 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
7 5am
18
33
15 8am
18
18
18 11am
18
18
18 2pm
18
18
18 5pm
18
18
18 8pm
18
18
18 11pm
18
18
19 2am
19
19
Station readings
7
18
33
CAMS model adj -6
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
25
25
25
AD 728×90

Air Quality Index Trend

47h · 2 stn

Saint-Léonard's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

83.6%
Humidity
46.8 km/h
Wind NNE
1010.0 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
15
3.67 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Saint-Léonard?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations
PM2.53.67 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (11 stations within 25 km)
3.67
Median
3.79
Average
3.1
Low
4.94
High
PM2.5 µg/m³ · Model: 5.8 · Bias: +2.1

What is the 7-day forecast for Saint-Léonard?

09-05
25.2° 13.8°
3.0 mm
09-06
23.2° 12.9°
8.88 mm
09-07
19.9° 11.8°
09-08
18.0° 12.5°
5.69 mm
09-09
24.3° 10.9°
0.31 mm
09-10
20.8° 11.8°
14.31 mm
09-11
26.4° 10.9°
0.19 mm
Both models agree Avg diff: 4.6°C

Where are air quality stations near Saint-Léonard?

23
Anjou, Montreal, Canada
3.3 km PM2.5: 5.5 µg/m³
23
Anjou, Montreal, Canada
3.3 km PM2.5: 5.5 µg/m³
34
Anjou, Montreal, Canada
3.3 km PM2.5: 8.2 µg/m³
23
Anjou, Montreal, Canada
3.3 km PM2.5: 5.5 µg/m³
24
Anjou, Montreal, Canada
3.3 km PM2.5: 5.8 µg/m³
21
Caserne 17, Montreal, Canada
3.4 km PM2.5: 5.0 µg/m³
14
Caserne 17, Montreal, Canada
3.4 km PM2.5: 3.4 µg/m³
13
Caserne 17, Montreal, Canada
3.4 km PM2.5: 3.1 µg/m³
14
Caserne 17, Montreal, Canada
3.4 km PM2.5: 3.4 µg/m³
23
Caserne 17, Montreal, Canada
3.4 km PM2.5: 5.5 µg/m³

What cities are near Saint-Léonard?

15 Saint-Michel 13 Montréal-Nord 16 Villeray–Saint-Michel–Parc-Extension 19 Mercier–Hochelaga-Maisonneuve 15 Saint-Vincent-de-Paul 15 Duvernay 16 Rosemont–La Petite-Patrie 13 Rivière-des-Prairies–Pointe-aux-Trembles 16 Ahuntsic-Cartierville 16 Val-des-Arbres
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-09-05T12:11 UTC.