What is the air quality in Le Vieux-Longueuil today?

The current Air Quality Index (AQI) in Le Vieux-Longueuil is 32 (Good). PM2.5 concentration is 7.56 µg/m³.

What is the temperature in Le Vieux-Longueuil right now?

The current temperature in Le Vieux-Longueuil is 8.2°C (feels like 2.5°C). Humidity is 70.1% and wind speed is 61.6 km/h.

Is it safe to go outside in Le Vieux-Longueuil?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Le Vieux-Longueuil, Canada

Windy

8.2°C · 70.1% humidity

8.2°

Feels 2.5°

Good

Air quality is satisfactory. Enjoy outdoor activities.

16 stations

Nearby Monitoring Stations

AQI Forecast

152 8pm

32 11pm

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Station readings

152

Air Quality Index Trend

47h · 2 stn

View full history →

Le Vieux-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.

70.1%

Humidity

61.6 km/h

Wind W

1018.9 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

7.56 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Le Vieux-Longueuil?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations

PM2.57.56 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.0

Low

Station readings (16 stations within 25 km)

7.56

Median

6.96

Average

3.4

Low

11.05

High

PM2.5 µg/m³ · Model: 6.0 · Bias: -1.6

What is the 7-day forecast for Le Vieux-Longueuil?

10-21

14.6° 5.1°

10-22

12.0° 4.8°

11.56 mm

10-23

13.7° 7.4°

2.56 mm

10-24

14.8° 4.5°

0.5 mm

10-25

18.7° 7.0°

17.56 mm

10-26

8.5° 5.2°

1.19 mm

10-27

9.6° 3.3°

1.5 mm

Both models agree Avg diff: 4.5°C

Where are air quality stations near Le Vieux-Longueuil?

canada-montreal-rue-ida-steinberg

3.3 km PM2.5: 6.9 µg/m³

Molson, Montreal, Canada

5.0 km PM2.5: 3.4 µg/m³

Molson, Montreal, Canada

5.0 km PM2.5: 3.4 µg/m³

Molson, Montreal, Canada

5.0 km PM2.5: 4.8 µg/m³

Molson, Montreal, Canada

5.0 km PM2.5: 6.5 µg/m³

Molson, Montreal, Canada

5.0 km PM2.5: 7.2 µg/m³

Molson, Montreal, Canada

5.0 km PM2.5: 4.6 µg/m³

Molson, Montreal, Canada

5.0 km PM2.5: 6.0 µg/m³

Molson, Montreal, Canada

5.0 km PM2.5: 7.2 µg/m³

Molson, Montreal, Canada

5.0 km PM2.5: 4.6 µg/m³

What cities are near Le Vieux-Longueuil?

30 Longueuil 36 Mercier–Hochelaga-Maisonneuve 32 Laflèche 19 Le Plateau-Mont-Royal 20 Ville-Marie 34 Greenfield Park 20 Montréal 22 Mile End 24 Rosemont–La Petite-Patrie 27 Villeray–Saint-Michel–Parc-Extension

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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 2026-10-21T03:41 UTC.