Alliston
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Alliston Live Precipitation Radar
Full Screen ViewAlliston Live Doppler RadarMSC Dual-Pol
Alliston, ON • Lat: 44.62° N, Lon: 85.35° W • Sweep 10m
Alliston 30-Year Weather History & Monthly Averages
Explore month-by-month temperatures, annual snowfall in cm, rainy days, and historical record highs and lows.
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 Alliston, ON
What is the current temperature and conditions in Alliston?
As of today, the temperature in Alliston is 20.9°C with clear sky. The apparent temperature (feels like) is 22.1°C with relative humidity at 55%.
How does Wind Chill and Humidex affect Alliston?
During warmer conditions, the Canadian Humidex indicates comfort levels. The current Humidex is 22 (Comfortable).
What is the Air Quality Health Index (AQHI) for Alliston?
The current AQHI for Alliston 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 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.