Air Quality in Thunder Bay, Canada
Cloudy
18.8°C · 79.7% humidity
18.8°
Feels 18.8°
25
Good
Air quality is satisfactory. Enjoy outdoor activities.
Model forecast
Nearby Monitoring Stations
Thunder Bay's air quality — share it
AQI Forecast
Calibrated
111
10am
111
111
25
1pm
50
76
109
4pm
147
216
235
7pm
239
254
243
10pm
244
230
168
1am
168
151
139
4am
140
140
140
7am
152
169
Station readings
18h ago
AQI 57
PM2.5 15.0 µg/m³ · 18h ago
CAMS model
adj +86
25
25
25
24
25
34
54
83
146
161
161
174
161
161
146
84
83
66
54
54
54
54
66
83
Air Quality Index Trend
8h · 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.
79.7%
Humidity
21.6 km/h
Wind SE
1015.6 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
5.9 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Thunder Bay?
Temperature & Precipitation
PM2.5 Trend
8h · 1 stationPM2.55.9 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX5.9
High
What is the 7-day forecast for Thunder Bay?
07-21
19.5° 12.9°
8.0 mm
07-22
16.8° 14.0°
4.37 mm
07-23
19.5° 14.0°
0.44 mm
07-24
23.1° 10.5°
1.19 mm
07-25
21.1° 13.8°
0.88 mm
07-26
22.3° 13.3°
2.25 mm
07-27
27.1° 15.2°
Both models agree
Avg diff: 4.8°C
Where are air quality stations near Thunder Bay?
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T17:19 UTC.