Air Quality in Thunder Bay, Canada
Windy
23.9°C · 33.7% humidity
23.9°
Feels 23.9°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station
Nearby Monitoring Stations
Thunder Bay's air quality — share it
AQI Forecast
Calibrated
25
4pm
25
25
25
7pm
25
25
32
10pm
32
25
25
1am
25
25
25
4am
25
25
25
7am
25
22
23
10am
23
23
23
1pm
23
23
Station readings
30
25
25
21
CAMS model
adj -2
27
27
27
27
27
27
34
34
27
27
27
27
27
27
27
27
27
24
25
25
25
25
25
25
Air Quality Index Trend
27h · 1 stnThunder Bay's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
33.7%
Humidity
52.9 km/h
Wind NNW
1017.2 hPa
Pressure
4.4
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
6.0 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Thunder Bay?
Temperature & Precipitation
PM2.5 Trend
27h · 1 stationPM2.56.0 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX4.4
Moderate
Station readings (1 station within 25 km)
6.0
Median
6.0
Average
6.0
Low
6.0
High
PM2.5 µg/m³ · Model: 7.35 · Bias: +1.4
What is the 7-day forecast for Thunder Bay?
08-03
23.9° 17.1°
0.69 mm
08-04
21.5° 10.1°
1.37 mm
08-05
21.7° 11.7°
08-06
22.9° 15.0°
0.25 mm
08-07
23.5° 12.6°
08-08
24.4° 13.6°
0.5 mm
08-09
23.8° 13.5°
2.25 mm
Both models agree
Avg diff: 4.6°C
Where are air quality stations near Thunder Bay?
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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 2026-08-07T23:46 UTC.