South Sarnia
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South Sarnia Live Precipitation Radar
Full Screen ViewSouth Sarnia Live Doppler RadarMSC Dual-Pol
South Sarnia, ON • Lat: 42.04° N, Lon: 81.12° W • Sweep 10m
South Sarnia 30-Year Weather History & Monthly Averages
Explore month-by-month temperatures, annual snowfall in cm, rainy days, and historical record highs and lows.
South Sarnia 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 South Sarnia, ON
What is the current temperature and conditions in South Sarnia?
As of today, the temperature in South Sarnia is 20.8°C with drizzle. The apparent temperature (feels like) is 22.4°C with relative humidity at 93%.
How does Wind Chill and Humidex affect South Sarnia?
During warmer conditions, the Canadian Humidex indicates comfort levels. The current Humidex is 28 (Comfortable).
What is the Air Quality Health Index (AQHI) for South Sarnia?
The current AQHI for South Sarnia is 5 (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 South Sarnia 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.