Air Quality in Sarnia, Canada
Windy
18.3°C · 77.3% humidity
18.3°
Feels 18.3°
19
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations
Nearby Monitoring Stations
Sarnia's air quality — share it
AQI Forecast
Calibrated
22
5am
22
22
19
8am
23
23
22
11am
22
22
22
2pm
22
22
22
5pm
22
22
23
8pm
23
23
23
11pm
23
23
23
2am
23
25
Station readings
25
21
21
17
CAMS model
adj -2
24
24
24
25
25
25
24
24
24
24
24
24
24
24
24
25
25
25
25
25
25
25
25
27
Air Quality Index Trend
47h · 1 stnSarnia's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
77.3%
Humidity
49.2 km/h
Wind N
1014.5 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
4.55 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Sarnia?
Temperature & Precipitation
PM2.5 Trend
47h · 1 stationPM2.54.55 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX1.4
Low
Station readings (3 stations within 25 km)
4.55
Median
4.3
Average
3.8
Low
5.0
High
PM2.5 µg/m³ · Model: 6.0 · Bias: +1.5
What is the 7-day forecast for Sarnia?
09-05
21.4° 13.4°
0.06 mm
09-06
24.9° 11.9°
1.5 mm
09-07
23.1° 13.8°
12.69 mm
09-08
23.7° 13.9°
2.38 mm
09-09
27.7° 13.4°
3.62 mm
09-10
24.2° 12.0°
1.0 mm
09-11
21.3° 15.2°
0.69 mm
Both models agree
Avg diff: 4.1°C
Where are air quality stations near Sarnia?
30
Sarnia, Ontario, Canada
21
Sarnia, Ontario, Canada
17
Sarnia, Ontario, Canada
15
Port Huron, Michigan, USA
What cities are near Sarnia?
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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 2026-09-05T12:11 UTC.