Air Quality in Thunder Bay, Canada
Clear
18.9°C · 43.2% humidity
18.9°
Feels 18.9°
37
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations
Nearby Monitoring Stations
Thunder Bay's air quality — share it
AQI Forecast
Calibrated
34
4pm
34
34
37
7pm
34
35
35
10pm
35
35
35
1am
35
35
35
4am
35
35
35
7am
35
34
34
10am
34
34
34
1pm
34
34
Station readings
25h ago
AQI 34
PM2.5 8.2 µg/m³ · 25h ago
Air Quality Index Trend
26h · 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.
43.2%
Humidity
35.2 km/h
Wind NNW
1007.1 hPa
Pressure
2.2
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
8.9 µg/m³
PM10
20.55 µg/m³
050100150200300500
What is the weather forecast for Thunder Bay?
Temperature & Precipitation
PM2.5 Trend
26h · 1 stationPM2.58.9 µg/m³
✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX2.2
Moderate
Station readings (2 stations within 25 km)
8.9
Median
8.9
Average
7.7
Low
10.1
High
PM2.5 µg/m³ · Model: 9.65 · Bias: +0.8
What is the 7-day forecast for Thunder Bay?
06-08
12.9° 10.3°
13.94 mm
06-09
19.1° 9.7°
2.0 mm
06-10
17.4° 9.5°
06-11
27.1° 9.5°
2.38 mm
06-12
16.1° 9.4°
0.13 mm
06-13
18.5° 8.8°
1.13 mm
06-14
24.3° 12.3°
1.69 mm
Both models agree
Avg diff: 3.5°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 2026-06-08T23:11 UTC.