Air Quality in Longueuil, Canada

Drizzle
10.0°C · 61.5% humidity
10.0°
Feels 5.5°
24
Good
Air quality is satisfactory. Enjoy outdoor activities.
14 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
13 10pm
17
15
24 1am
21
20
18 4am
17
15
14 7am
14
14
13 10am
13
13
13 1pm
13
13
13 4pm
13
13
13 7pm
13
42
Station readings
4
17
5
CAMS model adj -12
25
25
27
27
27
27
27
27
25
25
25
25
25
25
25
25
25
25
25
25
25
25
25
54
AD 728×90

Air Quality Index Trend

45h · 1 stn

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

61.5%
Humidity
49.4 km/h
Wind NW
1019.0 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
24
5.76 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Longueuil?

Temperature & Precipitation

PM2.5 Trend

45h · 1 station
PM2.55.76 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (14 stations within 25 km)
5.76
Median
5.55
Average
2.0
Low
9.1
High
PM2.5 µg/m³ · Model: 6.15 · Bias: +0.4

What is the 7-day forecast for Longueuil?

05-30
19.4° 9.0°
8.69 mm
05-31
23.7° 6.7°
1.94 mm
06-01
25.5° 18.6°
06-02
18.4° 11.1°
2.25 mm
06-03
27.3° 15.7°
06-04
22.5° 13.8°
0.88 mm
06-05
24.2° 12.5°
10.87 mm
Both models agree Avg diff: 4.3°C

Where are air quality stations near Longueuil?

–
canada-montreal-rue-leclaire
6.6 km PM2.5: 0.0 µg/m³
56
Montreal
6.7 km PM2.5: 14.5 µg/m³
5
canada-montreal-rue-ida-steinberg
7.2 km PM2.5: 1.1 µg/m³
68
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
8.1 km PM2.5: 20.2 µg/m³
15
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
8.1 km PM2.5: 3.6 µg/m³
14
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
8.1 km PM2.5: 3.4 µg/m³
14
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
8.1 km PM2.5: 3.4 µg/m³
–
canada-montreal-18e-avenue
14.9 km PM2.5: 0.0 µg/m³
–
Montréal, Ahuntsic Live Meteo Station
16.6 km 49.8°C 90.9% RH PM2.5: 0.0 µg/m³ PM10: 1.0 µg/m³
2
Laval, Quebec, Canada
21.6 km PM2.5: 0.5 µg/m³

What cities are near Longueuil?

23 Laflèche 23 Greenfield Park 23 Le Vieux-Longueuil 23 Saint-Hubert 20 Brossard 28 Ville-Marie 23 Ile-des-Soeurs 21 Mercier–Hochelaga-Maisonneuve 24 Boucherville 30 Le Plateau-Mont-Royal
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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 2026-05-30T05:14 UTC.