Air Quality in Longueuil, Canada

Windy
12.3°C · 74.5% humidity
12.3°
Feels 12.3°
29
Good
Air quality is satisfactory. Enjoy outdoor activities.
12 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
11 7pm
19
24
29 10pm
32
33
35 1am
16
9
10 4am
10
10
11 7am
11
11
11 10am
11
11
11 1pm
11
11
9 4pm
9
9
Station readings
11
19
24
36
CAMS model adj -16
25
27
54
54
54
54
54
34
27
27
27
27
27
27
27
27
27
27
27
27
27
25
25
25
AD 728×90

Air Quality Index Trend

48h · 3 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.

74.5%
Humidity
43.1 km/h
Wind SW
998.1 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
29
6.88 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Longueuil?

Temperature & Precipitation

PM2.5 Trend

48h · 3 stations
PM2.56.88 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (12 stations within 25 km)
6.88
Median
7.54
Average
0.7
Low
21.1
High
PM2.5 µg/m³ · Model: 10.85 · Bias: +4.0

What is the 7-day forecast for Longueuil?

06-09
23.4° 11.7°
1.13 mm
06-10
19.3° 12.2°
15.62 mm
06-11
24.5° 9.5°
06-12
22.3° 15.5°
13.13 mm
06-13
26.2° 16.9°
17.75 mm
06-14
26.2° 12.3°
10.5 mm
06-15
24.3° 17.5°
17.06 mm
Both models agree Avg diff: 6.0°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
42
canada-montreal-rue-ida-steinberg
7.2 km PM2.5: 10.1 µg/m³
27
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
8.1 km PM2.5: 6.5 µg/m³
128
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
8.1 km PM2.5: 46.5 µg/m³
114
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
8.1 km PM2.5: 40.8 µg/m³
15
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
8.1 km PM2.5: 3.6 µg/m³
–
canada-montreal-18e-avenue
14.9 km PM2.5: 0.0 µg/m³
17
Montréal, Ahuntsic Live Meteo Station
16.6 km 78.2°C 49.4% RH PM2.5: 4.0 µg/m³ PM10: 4.0 µg/m³
2
Laval, Quebec, Canada
21.6 km PM2.5: 0.5 µg/m³

What cities are near Longueuil?

28 Laflèche 27 Greenfield Park 28 Le Vieux-Longueuil 28 Saint-Hubert 23 Brossard 32 Ville-Marie 30 Ile-des-Soeurs 29 Mercier–Hochelaga-Maisonneuve 34 Boucherville 15 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 2026-06-09T02:17 UTC.