Air Quality in Saint-Constant, Canada

Clear
26.5°C · 43.8% humidity
26.5°
Feels 26.5°
69
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
3 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
62 10am
74
71
69 1pm
67
66
58 4pm
57
56
56 7pm
56
55
55 10pm
53
53
52 1am
52
52
52 4am
52
52
52 7am
52
52
Station readings
62
74
71
CAMS model adj +28
27
27
27
34
34
34
27
27
27
27
27
27
27
25
25
24
24
24
24
24
24
24
24
24
AD 728×90

Air Quality Index Trend

47h · 3 stn

Saint-Constant'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-Constant is 1.4× the WHO 24-hour guideline of 15 µg/m³.

43.8%
Humidity
37.8 km/h
Wind ENE
1015.4 hPa
Pressure
14.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
69
20.59 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Saint-Constant?

Temperature & Precipitation

PM2.5 Trend

47h · 3 stations
PM2.520.59 µg/m³ ×1.4 WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX14.9
Extreme
AD 300×250
Station readings (3 stations within 25 km)
20.59
Median
21.05
Average
14.11
Low
28.33
High
PM2.5 µg/m³ · Model: 13.7 · Bias: -6.9

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

07-21
26.5° 20.8°
07-22
25.3° 18.2°
0.19 mm
07-23
20.5° 13.5°
5.75 mm
07-24
23.6° 14.5°
1.13 mm
07-25
20.5° 18.6°
12.81 mm
07-26
22.8° 16.0°
7.56 mm
07-27
27.8° 18.4°
0.88 mm
Both models agree Avg diff: 2.3°C

Where are air quality stations near Saint-Constant?

37
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
11.3 km PM2.5: 8.9 µg/m³
24
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
11.3 km PM2.5: 5.8 µg/m³
193
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
11.3 km PM2.5: 136.8 µg/m³
132
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
11.3 km PM2.5: 48.1 µg/m³
40
Montreal
15.8 km PM2.5: 9.6 µg/m³
53
Montreal
15.8 km PM2.5: 13.1 µg/m³
25
Montreal
15.8 km PM2.5: 6.0 µg/m³
40
Montreal
15.8 km PM2.5: 9.6 µg/m³
58
Rue Bourret
20.7 km PM2.5: 15.3 µg/m³ PM10: 15.3 µg/m³
–
canada-montreal-rue-leclaire
21.1 km PM2.5: 0.0 µg/m³

What cities are near Saint-Constant?

72 Sainte-Catherine 67 Candiac 69 La Prairie 77 Desmarchais-Crawford 77 Ville-Émard 76 Verdun 73 Ile-des-Soeurs 77 Saint-Henri 77 Le Sud-Ouest 70 Brossard
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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 2026-07-21T17:19 UTC.