Lake St. Thomas
No need to modify usual outdoor activities unless you experience symptoms such as coughing or throat irritation.
Lake St. Thomas Live Precipitation Radar
Full Screen ViewLake St. Thomas Live Doppler RadarMSC Dual-Pol
Lake St. Thomas, ON • Lat: 42.85° N, Lon: 87.09° W • Sweep 10m
Lake St. Thomas 30-Year Weather History & Monthly Averages
Explore month-by-month temperatures, annual snowfall in cm, rainy days, and historical record highs and lows.
Lake St. Thomas 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 Lake St. Thomas, ON
What is the current temperature and conditions in Lake St. Thomas?
As of today, the temperature in Lake St. Thomas is 17.9°C with overcast. The apparent temperature (feels like) is 18.3°C with relative humidity at 95%.
How does Wind Chill and Humidex affect Lake St. Thomas?
During warmer conditions, the Canadian Humidex indicates comfort levels. The current Humidex is 18 (Comfortable).
What is the Air Quality Health Index (AQHI) for Lake St. Thomas?
The current AQHI for Lake St. Thomas 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 Lake St. Thomas 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.