Air Quality in Thunder Bay, Canada
Drizzle
12.8°C · 95.1% humidity
12.8°
Feels 12.8°
23
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations
Nearby Monitoring Stations
Thunder Bay's air quality — share it
AQI Forecast
Calibrated
25
5am
25
25
23
8am
25
25
25
11am
25
25
25
2pm
25
25
25
5pm
25
25
26
8pm
25
25
25
11pm
25
25
25
2am
25
25
Station readings
25
25
25
21
CAMS model
adj +1
24
24
24
24
24
24
24
24
24
24
24
24
24
24
24
25
24
24
24
24
24
24
24
24
Air Quality Index Trend
44h · 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.
95.1%
Humidity
10.3 km/h
Wind WSW
1009.7 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
5.5 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Thunder Bay?
Temperature & Precipitation
PM2.5 Trend
44h · 1 stationPM2.55.5 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
Station readings (2 stations within 25 km)
5.5
Median
5.5
Average
5.0
Low
6.0
High
PM2.5 µg/m³ · Model: 5.9 · Bias: +0.4
What is the 7-day forecast for Thunder Bay?
09-05
14.5° 11.4°
0.44 mm
09-06
18.2° 8.6°
0.13 mm
09-07
18.4° 12.1°
09-08
17.1° 9.1°
6.31 mm
09-09
21.1° 9.7°
7.56 mm
09-10
21.1° 9.5°
14.12 mm
09-11
16.9° 7.6°
3.88 mm
Both models agree
Avg diff: 5.6°C
Where are air quality stations near Thunder Bay?
What cities are 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 2026-09-05T12:11 UTC.