Thunder Bay
No need to modify usual outdoor activities unless you experience symptoms such as coughing or throat irritation.
Thunder Bay Live Precipitation Radar
Full Screen ViewThunder Bay Live Doppler RadarMSC Dual-Pol
Thunder Bay, ON • Lat: 48.38° N, Lon: 89.25° W • Sweep 10m
Thunder Bay 30-Year Weather History & Monthly Averages
Explore month-by-month temperatures, annual snowfall in cm, rainy days, and historical record highs and lows.
Thunder Bay Air Quality & Wildfire Smoke Report
Detailed Canadian AQHI breakdown, fine particulate matter (PM2.5), ground-level ozone, and health guidance.
Frequently Asked Questions About Weather in Thunder Bay, ON
What is the current temperature and conditions in Thunder Bay?
As of today, the temperature in Thunder Bay is 15.5°C with mainly sunny. The apparent temperature (feels like) is 14.5°C with relative humidity at 75%.
How does Wind Chill and Humidex affect Thunder Bay?
During warmer conditions, the Canadian Humidex indicates comfort levels. The current Humidex is 16 (Comfortable).
What is the Air Quality Health Index (AQHI) for Thunder Bay?
The current AQHI for Thunder Bay is 4 (Moderate Risk). It is calculated based on ground-level ozone, fine particulate matter (PM2.5), and nitrogen dioxide levels according to Health Canada standards.
Where does the meteorological data for Thunder Bay come from?
Forecasts are generated using high-resolution Canadian Deterministic Prediction System (HRDPS 2.5km) and Global Environmental Multiscale (GEM) models alongside official Environment and Climate Change Canada Doppler radar feeds.