Air Quality in Saint-Léonard, Canada

Windy
12.1°C · 78.2% humidity
12.1°
Feels 12.1°
45
Good
Air quality is satisfactory. Enjoy outdoor activities.
12 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
11 5pm
13
10
45 8pm
63
57
52 11pm
49
47
25 2am
17
16
16 5am
15
15
15 8am
14
14
14 11am
14
14
14 2pm
14
12
Station readings
11
13
10
18
CAMS model adj -13
25
25
25
27
54
54
54
54
54
34
27
27
27
27
27
27
27
27
27
27
27
27
27
25
AD 728×90

Air Quality Index Trend

48h · 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.

78.2%
Humidity
50.8 km/h
Wind SW
997.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
45
10.79 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Saint-Léonard?

Temperature & Precipitation

PM2.5 Trend

48h · 2 stations
PM2.510.79 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (12 stations within 25 km)
10.79
Median
9.0
Average
2.67
Low
16.4
High
PM2.5 µg/m³ · Model: 7.35 · Bias: -3.4

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

06-09
25.0° 11.4°
1.56 mm
06-10
16.4° 10.4°
10.13 mm
06-11
22.8° 9.0°
06-12
19.6° 15.7°
9.13 mm
06-13
26.8° 16.8°
26.12 mm
06-14
24.1° 10.4°
5.25 mm
06-15
23.0° 16.0°
15.06 mm
Both models agree Avg diff: 7.2°C

Where are air quality stations near Saint-Léonard?

21
canada-montreal-rue-ida-steinberg
5.7 km PM2.5: 5.0 µg/m³
–
canada-montreal-rue-leclaire
6.2 km PM2.5: 0.0 µg/m³
12
Montréal, Ahuntsic Live Meteo Station
6.9 km 83.8°C 35.6% RH PM2.5: 3.0 µg/m³ PM10: 3.0 µg/m³
56
Montreal
9.4 km PM2.5: 14.5 µg/m³
2
Laval, Quebec, Canada
9.4 km PM2.5: 0.5 µg/m³
151
Laval, Quebec, Canada
9.4 km PM2.5: 55.5 µg/m³
124
Laval, Quebec, Canada
9.4 km PM2.5: 44.8 µg/m³
–
canada-montreal-18e-avenue
9.7 km PM2.5: 0.0 µg/m³
25
Terrebonne - secteur du parc Vaillant, Quebec, Canada
13.9 km PM2.5: 6.0 µg/m³
51
Terrebonne - secteur du parc Vaillant, Quebec, Canada
13.9 km PM2.5: 12.1 µg/m³

What cities are near Saint-Léonard?

43 Saint-Michel 57 Montréal-Nord 41 Villeray–Saint-Michel–Parc-Extension 26 Mercier–Hochelaga-Maisonneuve 49 Saint-Vincent-de-Paul 41 Duvernay 40 Rosemont–La Petite-Patrie 45 Rivière-des-Prairies–Pointe-aux-Trembles 18 Ahuntsic-Cartierville 41 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 2026-06-09T00:51 UTC.