Port Thornbury
No need to modify usual outdoor activities unless you experience symptoms such as coughing or throat irritation.
Port Thornbury Live Precipitation Radar
Full Screen ViewPort Thornbury Live Doppler RadarMSC Dual-Pol
Port Thornbury, ON • Lat: 44.35° N, Lon: 78.30° W • Sweep 10m
Port Thornbury 30-Year Weather History & Monthly Averages
Explore month-by-month temperatures, annual snowfall in cm, rainy days, and historical record highs and lows.
Port Thornbury 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 Port Thornbury, ON
What is the current temperature and conditions in Port Thornbury?
As of today, the temperature in Port Thornbury is 21.1°C with overcast. The apparent temperature (feels like) is 21.5°C with relative humidity at 65%.
How does Wind Chill and Humidex affect Port Thornbury?
During warmer conditions, the Canadian Humidex indicates comfort levels. The current Humidex is 24 (Comfortable).
What is the Air Quality Health Index (AQHI) for Port Thornbury?
The current AQHI for Port Thornbury 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 Port Thornbury 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.