Air Quality in Châteauguay, Canada

Clear
27.5°C · 39.2% humidity
27.5°
Feels 27.5°
85
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
74 10am
86
77
85 1pm
80
77
68 4pm
66
65
64 7pm
64
63
63 10pm
61
60
59 1am
59
59
59 4am
59
59
59 7am
59
59
Station readings
74
86
77
CAMS model adj +35
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 · 2 stn

Châteauguay'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 Châteauguay is 1.9× the WHO 24-hour guideline of 15 µg/m³.

39.2%
Humidity
37.1 km/h
Wind ENE
1015.1 hPa
Pressure
14.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
85
28.33 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Châteauguay?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations
PM2.528.33 µg/m³ ×1.9 WHO
Moderate
PM1020.55 µg/m³
Good
UV INDEX14.9
Extreme
AD 300×250
Station readings (1 station within 25 km)
28.33
Median
28.33
Average
28.33
Low
28.33
High
PM2.5 µg/m³ · Model: 10.85 · Bias: -17.5

What is the 7-day forecast for Châteauguay?

07-21
27.5° 21.6°
07-22
25.9° 19.0°
07-23
20.0° 13.6°
5.87 mm
07-24
23.1° 15.4°
0.94 mm
07-25
20.5° 19.1°
12.75 mm
07-26
23.2° 16.0°
9.19 mm
07-27
27.2° 18.4°
1.19 mm
Both models agree Avg diff: 2.7°C

Where are air quality stations near Châteauguay?

76
Montréal, Ahuntsic Live Meteo Station
20.2 km 84.0°C 52.8% RH PM2.5: 24.0 µg/m³ PM10: 24.0 µg/m³
25
Montreal
20.6 km PM2.5: 6.0 µg/m³
40
Montreal
20.6 km PM2.5: 9.6 µg/m³
40
Montreal
20.6 km PM2.5: 9.6 µg/m³
53
Montreal
20.6 km PM2.5: 13.1 µg/m³
24
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
22.9 km PM2.5: 5.8 µg/m³
193
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
22.9 km PM2.5: 136.8 µg/m³
132
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
22.9 km PM2.5: 48.1 µg/m³
37
Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada
22.9 km PM2.5: 8.9 µg/m³
34
Laval, Quebec, Canada
25.0 km PM2.5: 8.2 µg/m³

What cities are near Châteauguay?

80 Dorval 85 Pointe-Claire 90 Beaconsfield 80 Côte-Saint-Luc 90 Kirkland 72 Sainte-Catherine 81 Dollard-Des Ormeaux 77 Ville-Émard 91 Pierrefonds 69 Saint-Constant
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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 2026-07-21T17:22 UTC.