What is the air quality in Sarnia today?

The current Air Quality Index (AQI) in Sarnia is 47 (Good). PM2.5 concentration is 11.3 µg/m³.

What is the temperature in Sarnia right now?

The current temperature in Sarnia is 10.4°C (feels like 10.4°C). Humidity is 73.5% and wind speed is 51.6 km/h.

Is it safe to go outside in Sarnia?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.7 (Low).

Air Quality in Sarnia, Canada

Windy

10.4°C · 73.5% humidity

10.4°

Feels 10.4°

Good

Air quality is satisfactory. Enjoy outdoor activities.

3 stations

Nearby Monitoring Stations

AQI Forecast Calibrated

23 5pm

47 8pm

32 11pm

26 2am

25 5am

24 8am

26 11am

24 2pm

Station readings 26h ago

AQI 23

PM2.5 5.5 µg/m³ · 26h ago

Air Quality Index Trend

48h · 1 stn

View full history →

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

73.5%

Humidity

51.6 km/h

Wind NNW

1005.5 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

11.3 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Sarnia?

Temperature & Precipitation

PM2.5 Trend

48h · 1 station

PM2.511.3 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

Station readings (3 stations within 25 km)

11.3

Median

11.3

Average

10.6

Low

12.0

High

PM2.5 µg/m³ · Model: 6.15 · Bias: -5.2

What is the 7-day forecast for Sarnia?

06-09

30.1° 10.4°

1.56 mm

06-10

15.9° 14.6°

8.38 mm

06-11

24.5° 9.9°

06-12

26.3° 17.3°

7.56 mm

06-13

25.7° 18.7°

1.81 mm

06-14

25.0° 13.3°

06-15

29.7° 18.3°

11.06 mm

Both models agree Avg diff: 7.3°C

Where are air quality stations near Sarnia?

Sarnia, Ontario, Canada

0.4 km PM2.5: 11.0 µg/m³

Port Huron, Michigan, USA

5.1 km PM2.5: 6.2 µg/m³

Port Huron, Michigan, USA

5.1 km PM2.5: 8.2 µg/m³

Port Huron, Michigan, USA

5.1 km PM2.5: 8.6 µg/m³

What cities are near Sarnia?

47 Port Huron 27 Mount Clemens 31 Clinton Township 25 Shelby 26 Strathroy 33 Chatham 35 Saint Clair Shores 33 Sterling Heights 35 Roseville 32 Rochester Hills

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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 2026-06-09T00:39 UTC.