Air Quality in Sarnia, Canada

Windy
19.3°C · 59.2% humidity
19.3°
Feels 19.3°
53
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
2 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
50 4pm
50
50
53 7pm
50
50
50 10pm
50
48
48 1am
50
50
57 4am
77
77
77 7am
77
48
48 10am
48
47
48 1pm
48
48
Station readings
50
55
55
58
CAMS model adj +23
27
27
27
27
27
27
27
27
25
25
27
27
34
54
54
54
54
25
25
25
24
25
25
25
AD 728×90

Air Quality Index Trend

27h · 1 stn

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.

59.2%
Humidity
67.3 km/h
Wind NNE
1017.0 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
53
13.0 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Sarnia?

Temperature & Precipitation

PM2.5 Trend

27h · 1 station
PM2.513.0 µg/m³ ✓ WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (2 stations within 25 km)
13.0
Median
13.0
Average
12.0
Low
14.0
High
PM2.5 µg/m³ · Model: 6.5 · Bias: -6.5

What is the 7-day forecast for Sarnia?

08-03
24.9° 19.3°
0.25 mm
08-04
33.0° 16.2°
0.13 mm
08-05
33.1° 14.4°
0.38 mm
08-06
30.8° 19.1°
11.88 mm
08-07
31.3° 14.1°
2.25 mm
08-08
36.3° 17.2°
4.75 mm
08-09
35.4° 22.0°
Both models agree Avg diff: 4.4°C

Where are air quality stations near Sarnia?

58
Sarnia, Ontario, Canada
0.4 km PM2.5: 15.4 µg/m³
42
Sarnia, Ontario, Canada
0.4 km PM2.5: 10.1 µg/m³
53
Sarnia, Ontario, Canada
0.4 km PM2.5: 13.1 µg/m³
14
Sarnia, Ontario, Canada
0.4 km PM2.5: 3.4 µg/m³
42
Sarnia, Ontario, Canada
0.4 km PM2.5: 10.1 µg/m³
50
Sarnia, Ontario, Canada
0.4 km PM2.5: 12.0 µg/m³
55
Sarnia, Ontario, Canada
0.4 km PM2.5: 14.0 µg/m³
66
Port Huron, Michigan, USA
5.1 km PM2.5: 19.2 µg/m³
42
Port Huron, Michigan, USA
5.1 km PM2.5: 10.1 µg/m³

What cities are near Sarnia?

53 Port Huron 31 Mount Clemens 31 Clinton Township 31 Shelby 38 Strathroy 42 Chatham 59 Saint Clair Shores 42 Sterling Heights 60 Roseville 34 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 2026-08-07T23:45 UTC.