Toronto Weather Outlook: Heat Warning Continues


Current Conditions

Thursday, 20 June 2024

At 6:00 AM EDT, Toronto Pearson International Airport reported mostly cloudy skies with a temperature of 22.2°C. The dew point was 21.6°C, resulting in a high humidity of 96%. Winds were light from the east-northeast at 5 km/h. The humidex was 31, indicating it feels much warmer than the actual temperature. The barometric pressure was 102.5 kPa and rising, indicating stable weather conditions.

Detailed Forecast

Heat Warning: Prolonged Heat Event

Toronto remains under a heat warning, with dangerously hot and humid conditions expected through Friday. Daytime highs will range from 30 to 34°C, with humidex values between 40 and 44. Overnight lows will only drop to 20 to 23°C, with humidex values of 26 to 30. These temperatures may be slightly cooler near the shores of the Great Lakes.

Hot and humid air can worsen air quality, potentially pushing the Air Quality Health Index into the high-risk category. It’s essential to stay hydrated by drinking water regularly, even before feeling thirsty. Vulnerable populations, including older adults, infants, pregnant people, and those with illnesses or disabilities, should take extra precautions. Never leave children or pets in parked vehicles.

Symptoms of Heat Illness:

  • Swelling, rash, cramps, fainting, heat exhaustion, heat stroke, and worsening of pre-existing health conditions.

Emergency Response for Heat Stroke:

  • Call 911 immediately if someone has a high body temperature, confusion, stops sweating, or becomes unconscious.
  • Move the person to a cool place, apply cold water to large areas of the skin, and fan them as much as possible.

Today: Cloudy with Showers and Thunderstorms

Showers will end early this morning, transitioning to a mix of sun and cloud. There is a 30% chance of showers this afternoon, with a risk of thunderstorms. The high will reach 31°C with a humidex of 39. The UV index will be 10, classified as very high.

Wardrobe Suggestions

  • Light, breathable clothing and a hat for sun protection.
  • Sunscreen due to the high UV index.
  • Stay in shaded or cool areas whenever possible.

Tonight: Partly Cloudy with Evening Showers

Tonight will be partly cloudy with a 30% chance of showers and a risk of thunderstorms. The temperature will remain warm at 22°C.

Friday, 21 June: Mixed Skies and Thunderstorm Risk

Friday will see a mix of sun and cloud with a 30% chance of showers and a risk of thunderstorms in the afternoon. The high will be 29°C with a humidex of 38, and the UV index will be 9, which is very high.

Night: Cloudy Periods

  • The evening will have cloudy periods with a 30% chance of showers and a low of 19°C.

Saturday, 22 June: Sun and Clouds

Saturday will bring a mix of sun and cloud with a 30% chance of showers. The high will be 28°C.

Night: Cloudy with Showers

  • The night will be cloudy with a 30% chance of showers and a low of 19°C.

Sunday, 23 June: Cloudy with Showers

Sunday will be predominantly cloudy with a 40% chance of showers and a high of 28°C.

Night: Cloudy Periods

  • The night will have cloudy periods and a low of 16°C.

Historic Weather

On this date, Toronto recorded a highest temperature of 35.0°C in 1988, while the lowest was 7.4°C in 1972.

Weather Trivia

Did you know? Toronto’s heatwaves can be intense, with high humidity levels making it feel much hotter. It’s crucial to stay hydrated and take necessary precautions during these prolonged heat events.

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