Bay Alliston
Ideal air quality for outdoor Canadian activities and sports.
Bay Alliston Live Precipitation Radar
Full Screen ViewBay Alliston Live Doppler RadarMSC Dual-Pol
Bay Alliston, ON • Lat: 42.30° N, Lon: 82.32° W • Sweep 10m
Bay Alliston 30-Year Weather History & Monthly Averages
Explore month-by-month temperatures, annual snowfall in cm, rainy days, and historical record highs and lows.
Bay Alliston 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 Bay Alliston, ON
What is the current temperature and conditions in Bay Alliston?
As of today, the temperature in Bay Alliston is 18.7°C with overcast. The apparent temperature (feels like) is 20.4°C with relative humidity at 94%.
How does Wind Chill and Humidex affect Bay Alliston?
During warmer conditions, the Canadian Humidex indicates comfort levels. The current Humidex is 19 (Comfortable).
What is the Air Quality Health Index (AQHI) for Bay Alliston?
The current AQHI for Bay Alliston is 3 (Low 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 Bay Alliston 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.