Air Quality in Saint-Léonard, Canada

Windy
19.0°C · 52.2% humidity
19.0°
Feels 19.0°
62
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
2 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
63 4pm
59
61
62 7pm
69
69
69 10pm
69
69
69 1am
69
69
69 4am
69
69
69 7am
69
62
62 10am
62
62
60 1pm
60
60
Station readings
63
59
61
CAMS model adj +35
27
25
25
27
34
34
34
34
34
34
34
34
34
34
34
34
34
27
27
27
27
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. Current PM2.5 concentration in Saint-Léonard is 1.2× the WHO 24-hour guideline of 15 µg/m³.

52.2%
Humidity
49.0 km/h
Wind W
1010.7 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
62
17.31 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
PM2.517.31 µg/m³ ×1.2 WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX2.2
Moderate
AD 300×250
Station readings (2 stations within 25 km)
17.31
Median
17.09
Average
16.0
Low
18.18
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -11.1

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

08-03
23.9° 15.4°
08-04
29.2° 16.7°
2.12 mm
08-05
26.6° 15.4°
2.81 mm
08-06
26.0° 19.1°
1.63 mm
08-07
22.1° 14.6°
1.31 mm
08-08
24.6° 16.0°
0.06 mm
08-09
31.0° 18.4°
0.44 mm
Both models agree Avg diff: 4.1°C

Where are air quality stations near Saint-Léonard?

47
Anjou, Montreal, Canada
3.3 km PM2.5: 11.3 µg/m³
10
Anjou, Montreal, Canada
3.3 km PM2.5: 2.4 µg/m³
23
Anjou, Montreal, Canada
3.3 km PM2.5: 5.5 µg/m³
27
Anjou, Montreal, Canada
3.3 km PM2.5: 6.5 µg/m³
52
Anjou, Montreal, Canada
3.3 km PM2.5: 12.6 µg/m³
53
Anjou, Montreal, Canada
3.3 km PM2.5: 13.1 µg/m³
22
Anjou, Montreal, Canada
3.3 km PM2.5: 5.3 µg/m³
42
Anjou, Montreal, Canada
3.3 km PM2.5: 10.1 µg/m³
62
Anjou, Montreal, Canada
3.3 km PM2.5: 17.3 µg/m³
43
Caserne 17, Montreal, Canada
3.4 km PM2.5: 10.3 µg/m³

What cities are near Saint-Léonard?

60 Saint-Michel 61 Montréal-Nord 61 Villeray–Saint-Michel–Parc-Extension 64 Mercier–Hochelaga-Maisonneuve 60 Saint-Vincent-de-Paul 60 Duvernay 61 Rosemont–La Petite-Patrie 62 Rivière-des-Prairies–Pointe-aux-Trembles 59 Ahuntsic-Cartierville 60 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 2026-08-07T23:46 UTC.