What is the air quality in Sarnia today?

The current Air Quality Index (AQI) in Sarnia is 36 (Good). PM2.5 concentration is 8.6 µg/m³.

What is the temperature in Sarnia right now?

The current temperature in Sarnia is 8.8°C (feels like 4.5°C). Humidity is 56.5% and wind speed is 37.3 km/h.

Is it safe to go outside in Sarnia?

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

Air Quality in Sarnia, Canada

Partly Cloudy

8.8°C · 56.5% humidity

8.8°

Feels 4.5°

Good

Air quality is satisfactory. Enjoy outdoor activities.

2 stations

Nearby Monitoring Stations

AQI Forecast

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Station readings

Air Quality Index Trend

46h · 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.

56.5%

Humidity

37.3 km/h

Wind ESE

1027.2 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

8.6 µg/m³

PM10

27.4 µg/m³

050100150200300500

What is the weather forecast for Sarnia?

Temperature & Precipitation

PM2.5 Trend

46h · 1 station

PM2.58.6 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

Station readings (2 stations within 25 km)

8.6

Median

8.25

Average

7.9

Low

8.6

High

PM2.5 µg/m³ · Model: 13.5 · Bias: +4.9

What is the 7-day forecast for Sarnia?

10-21

20.4° 7.5°

10-22

13.5° 5.6°

0.75 mm

10-23

15.1° 4.4°

0.25 mm

10-24

18.6° 4.9°

10-25

11.9° 5.8°

3.44 mm

10-26

9.8° 7.3°

2.25 mm

10-27

8.0° 2.2°

0.75 mm

Both models agree Avg diff: 4.3°C

Where are air quality stations near Sarnia?

Sarnia, Ontario, Canada

0.4 km PM2.5: 7.2 µg/m³

Sarnia, Ontario, Canada

0.4 km PM2.5: 6.2 µg/m³

Sarnia, Ontario, Canada

0.4 km PM2.5: 8.2 µg/m³

Port Huron, Michigan, USA

5.1 km PM2.5: 9.1 µg/m³

Port Huron, Michigan, USA

5.1 km PM2.5: 19.2 µg/m³

Port Huron, Michigan, USA

5.1 km PM2.5: 9.4 µg/m³

Port Huron, Michigan, USA

5.1 km PM2.5: 7.9 µg/m³

What cities are near Sarnia?

35 Port Huron 20 Mount Clemens 20 Clinton Township 19 Shelby 42 Strathroy 29 Chatham 31 Saint Clair Shores 20 Sterling Heights 30 Roseville 18 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 2026-10-21T00:31 UTC.