What is the air quality in Thunder Bay today?

The current Air Quality Index (AQI) in Thunder Bay is 33 (Good). PM2.5 concentration is 7.9 µg/m³.

What is the temperature in Thunder Bay right now?

The current temperature in Thunder Bay is 12.1°C (feels like 12.1°C). Humidity is 67.4% and wind speed is 16.6 km/h.

Is it safe to go outside in Thunder Bay?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 9.4 (Very High).

Air Quality in Thunder Bay, Canada

Partly Cloudy

12.1°C · 67.4% humidity

12.1°

Feels 12.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

3 stations

Nearby Monitoring Stations

AQI Forecast

24 2pm

33 5pm

28 8pm

26 11pm

25 2am

24 5am

24 8am

24 11am

Air Quality Index Trend

40h · 1 stn

View full history →

Thunder 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.

67.4%

Humidity

16.6 km/h

Wind SSE

1023.3 hPa

Pressure

9.4

UV Very High

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

7.9 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Thunder Bay?

Temperature & Precipitation

PM2.5 Trend

40h · 1 station

PM2.57.9 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX9.4

Very High

Station readings (3 stations within 25 km)

7.9

Median

7.9

Average

7.9

Low

7.9

High

PM2.5 µg/m³ · Model: 5.8 · Bias: -2.1

What is the 7-day forecast for Thunder Bay?

05-30

15.5° 4.3°

0.13 mm

05-31

24.5° 10.0°

06-01

18.9° 11.5°

1.94 mm

06-02

21.8° 5.4°

06-03

19.1° 17.2°

0.81 mm

06-04

18.1° 11.5°

06-05

16.5° 10.1°

0.62 mm

Both models agree Avg diff: 4.4°C

Where are air quality stations near Thunder Bay?

Thunder Bay, Ontario, Canada

3.0 km PM2.5: 28.7 µg/m³

Thunder Bay, Ontario, Canada

3.0 km PM2.5: 4.6 µg/m³

Thunder Bay, Ontario, Canada

3.0 km PM2.5: 3.1 µg/m³

What cities are near Thunder Bay?

24 Marquette 28 Duluth 28 Superior 38 Hibbing

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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 2026-05-30T21:31 UTC.