Early Morning Warmth Before the Real Heat Arrives
Toronto wakes this Sunday to an already balmy 23.2°C at 7:00 AM under partly cloudy skies. Humidity sits at 76%, with a dew point of 18.8°C making the air feel thick, and the humidex already reading 30 before breakfast. Winds are barely stirring from the south at 3 km/h, and barometric pressure is at 102.2 kPa and rising.
Environment Canada’s Heat Warning remains in effect for the city, with daytime highs pushing 33°C and humidex values peaking near 40. This multi-day heat event is expected to last until Tuesday—and possibly Wednesday—before cooler air finally offers relief.
Today: Hot, Sunny, and Not for the Faint of Heart
The sun will dominate today’s skies, with only the occasional puff of cloud. Winds will freshen from the south to 20 km/h this afternoon, but they’ll feel like a warm hair dryer rather than a refreshing breeze. The high will hit 33°C, with humidex conditions making it feel like 40°C. The UV index will soar to 8—very high—meaning sunscreen is a must if you venture outdoors.
Tonight stays warm and clear, with overnight lows barely dropping to 23°C, offering little respite from the heat.
Monday: A Rinse and Repeat Forecast
Monday will mirror today’s conditions almost perfectly: sunny skies, a high of 33°C, and humidex values again reaching 40°C. The UV index will remain at 8. Monday night will once again stay clear with lows holding around 23°C.
Tuesday: Still Steamy, Slightly Unstable
Tuesday will bring a mix of sun and cloud with a 40% chance of showers—perhaps nature’s way of trying to cool things down. Highs will hover around 32°C, with humidex values still oppressive. Tuesday night looks wetter and cloudier, with a 60% chance of showers and a low near 22°C.
Wardrobe Suggestions
Lightweight, light-coloured, and loose-fitting clothing is the order of the day. A wide-brimmed hat, sunglasses, and frequent hydration breaks are essential if you’re outdoors. If you can, plan errands or workouts early in the morning or after sunset. And remember—your car is not a sauna for pets or children.
Weather Trivia
Did you know? Toronto’s most intense recorded heatwave was in July 1936, when temperatures soared to 40.6°C. Without modern air conditioning, residents resorted to sleeping in parks, beaches, and even on rooftops to find relief.
Historic Temperatures for August 10:
Record high: 34.7°C (1949)
Record low: 9.4°C (1960)
