What is the air quality in Sarnia today?

The current Air Quality Index (AQI) in Sarnia is 25 (Good). PM2.5 concentration is 6.13 µg/m³.

What is the temperature in Sarnia right now?

The current temperature in Sarnia is 12.1°C (feels like 12.1°C). Humidity is 71.0% and wind speed is 23.4 km/h.

Is it safe to go outside in Sarnia?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 7.9 (Very High).

Air Quality in Sarnia, Canada

Cloudy

12.1°C · 71.0% humidity

12.1°

Feels 12.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

4 stations

Nearby Monitoring Stations

AQI Forecast

25 2pm

25 5pm

24 8pm

24 11pm

24 2am

24 5am

24 8am

24 11am

Air Quality Index Trend

47h · 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.

71.0%

Humidity

23.4 km/h

Wind NE

1022.7 hPa

Pressure

7.9

UV Very High

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

6.13 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Sarnia?

Temperature & Precipitation

PM2.5 Trend

47h · 1 station

PM2.56.13 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX7.9

Very High

Station readings (4 stations within 25 km)

6.13

Median

6.28

Average

6.0

Low

6.7

High

PM2.5 µg/m³ · Model: 5.8 · Bias: -0.3

What is the 7-day forecast for Sarnia?

05-30

20.1° 7.9°

05-31

24.5° 9.5°

06-01

27.7° 12.7°

0.25 mm

06-02

21.1° 11.8°

06-03

22.1° 19.9°

0.13 mm

06-04

17.8° 10.5°

0.06 mm

06-05

22.4° 7.8°

3.56 mm

Both models agree Avg diff: 5.8°C

Where are air quality stations near Sarnia?

Sarnia, Ontario, Canada

0.4 km PM2.5: 7.9 µg/m³

Port Huron, Michigan, USA

5.1 km PM2.5: 7.9 µg/m³

Port Huron, Michigan, USA

5.1 km PM2.5: 11.0 µg/m³

Port Huron, Michigan, USA

5.1 km PM2.5: 6.0 µg/m³

What cities are near Sarnia?

26 Port Huron 13 Mount Clemens 15 Clinton Township 10 Shelby 36 Strathroy 31 Chatham 20 Saint Clair Shores 16 Sterling Heights 20 Roseville 10 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 2026-05-30T21:31 UTC.