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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Perspective Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
For St Thomas, Ontario, the live forecast above tracks hourly changes in temperature, humidity, and wind off nearby Lake Erie. This page breaks down what those hourly readings mean for your day, from morning chill to afternoon peaks and overnight lows.
What drives the hourly shifts in St Thomas?
St Thomas sits inland from Lake Erie’s north shore, so hourly weather often reflects lake-breeze effects during spring and summer. The live forecast above captures those subtle swings — a cooler afternoon near the water, then gradual warming as the breeze shifts. For a broader look, the weather in st thomas ontario 10 days page shows how these daily cycles play out over the week, while the st thomas weather 14 day forecast extends the view for planning further ahead.
How does the hourly radar help track storms?
The st thomas weather radar hourly feed, linked in the live forecast above, shows precipitation moving through Elgin County in real time. This is especially useful during summer thunderstorms or winter lake-effect bands, giving you a heads-up before rain or snow arrives at your specific location in St Thomas.
St Thomas weather at a glance
Frequently asked questions about St Thomas hourly weather
How accurate is the hourly forecast for St Thomas?
Hourly forecasts from Environment Canada are highly reliable for the first 12 hours, with accuracy gradually decreasing beyond 48 hours. Check the live forecast above for the most current readings.
What does “feels like” temperature mean in the hourly data?
It combines actual air temperature with wind chill or humidex — important for St Thomas, where lake breezes can make winter afternoons feel several degrees colder than the thermometer shows.
Where can I check the st thomas weather radar hourly for rain?
The live forecast above links directly to the radar loop for Elgin County. You can also visit Environment Canada’s radar page for a broader view of systems approaching from Lake Erie or Lake Huron.