Grand Sarnia
Ideal air quality for outdoor activities.
Grand Sarnia Live Precipitation Radar
Full Screen ViewGrand Sarnia Live Doppler RadarMSC Dual-Pol
Grand Sarnia, ON • Lat: 53.08° N, Lon: 76.08° W • Sweep 10m
Grand Sarnia 30-Year Weather History & Monthly Averages
Explore month-by-month temperatures, annual snowfall in cm, rainy days, and historical record highs and lows.
Grand 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 Grand Sarnia, ON
What is the current temperature and conditions in Grand Sarnia?
As of today, the temperature in Grand Sarnia is 14°C with mainly sunny. The apparent temperature (feels like) is 12°C with relative humidity at 65%.
How does Wind Chill and Humidex affect Grand Sarnia?
During warmer conditions, the Canadian Humidex indicates comfort levels. The current Humidex is 14 (Comfortable).
What is the Air Quality Health Index (AQHI) for Grand Sarnia?
The current AQHI for Grand Sarnia is 2 (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 Grand 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.