What is the air quality in Mont-Saint-Hilaire today?

The current Air Quality Index (AQI) in Mont-Saint-Hilaire is 54 (Moderate). PM2.5 concentration is 13.7 µg/m³.

What is the temperature in Mont-Saint-Hilaire right now?

The current temperature in Mont-Saint-Hilaire is 24.5°C (feels like 24.5°C). Humidity is 61.2% and wind speed is 39.5 km/h.

Air Quality in Mont-Saint-Hilaire, Canada

Partly Cloudy

24.5°C · 61.2% humidity

24.5°

Feels 24.5°

Moderate

Unusually sensitive people should consider reducing prolonged outdoor exertion.

Model forecast

Nearby Monitoring Stations

AQI Forecast

27 10am

54 1pm

41 4pm

37 7pm

28 10pm

25 1am

24 4am

24 7am

Air Quality Index Trend

48h · 3 stn

View full history →

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

61.2%

Humidity

39.5 km/h

Wind NE

1015.5 hPa

Pressure

14.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

13.7 µg/m³

PM10

34.3 µg/m³

050100150200300500

What is the weather forecast for Mont-Saint-Hilaire?

Temperature & Precipitation

PM2.5 Trend

48h · 3 stations

PM2.513.7 µg/m³ ✓ WHO

Moderate

PM1034.3 µg/m³

Good

UV INDEX14.9

Extreme

What is the 7-day forecast for Mont-Saint-Hilaire?

07-21

24.9° 18.3°

07-22

23.8° 16.5°

0.31 mm

07-23

19.4° 13.4°

5.88 mm

07-24

22.8° 12.3°

1.69 mm

07-25

20.3° 17.0°

18.0 mm

07-26

21.1° 16.0°

6.37 mm

07-27

26.2° 18.4°

0.62 mm

Both models agree Avg diff: 2.3°C

Where are air quality stations near Mont-Saint-Hilaire?

Vallée-du-Richelieu, Quebec, Canada

3.6 km PM2.5: 20.7 µg/m³

Vallée-du-Richelieu, Quebec, Canada

3.6 km PM2.5: 8.2 µg/m³

Vallée-du-Richelieu, Quebec, Canada

3.6 km PM2.5: 0.2 µg/m³

Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada

25.8 km PM2.5: 8.9 µg/m³

Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada

25.8 km PM2.5: 5.8 µg/m³

193

Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada

25.8 km PM2.5: 136.8 µg/m³

132

Longueuil - secteur du parc Océanie (Brossard), Quebec, Canada

25.8 km PM2.5: 48.1 µg/m³

–

canada-montreal-18e-avenue

26.3 km PM2.5: 0.0 µg/m³

What cities are near Mont-Saint-Hilaire?

54 Beloeil 69 Saint-Basile-le-Grand 69 Sainte-Julie 69 Saint-Bruno-de-Montarville 60 Chambly 70 Saint-Hubert 61 Saint-Hyacinthe 72 Boucherville 72 Longueuil 71 Laflèche

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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T17:27 UTC.