Toronto Weather Outlook: Rainfall and Heat Warnings in Effect

Heat Warning

Current Weather

Observed at: Toronto Pearson Int’l Airport
Date: 6:00 AM EDT, Tuesday, July 9, 2024
Condition: Mostly Cloudy
Pressure: 101.3 kPa (Falling)
Temperature: 22.0°C
Dew point: 17.1°C
Humidity: 74%
Wind: WNW at 8 km/h
Humidex: 27
Visibility: 24 km

Toronto is experiencing mostly cloudy conditions this morning with a current temperature of 22°C. Two significant weather alerts are in effect: a rainfall advisory and a heat warning.

Rainfall Advisory


  • Torrential downpours with rainfall rates of 20 to 40 mm per hour.
  • Localized rainfall totals possibly exceeding 50 mm.


  • Starting late tonight or Wednesday and continuing into Thursday.


  • Confidence in the track and rainfall amounts is currently low.


  • Heavy rainfall from the remnants of Hurricane Beryl may impact southern Ontario, with potential for torrential downpours.


  • Monitor local updates from Conservation Authorities and Ontario Ministry of Natural Resources and Forestry for flooding information.

Heat Warning


  • Daytime highs around 31°C with humidex values between 35 and 38.
  • Risk of deteriorating air quality and high Air Quality Health Index.


  • Today with a cooler air mass expected tonight.

Health Risks:

  • Greater risk for older adults, infants, young children, pregnant individuals, and those with physical/mental health issues or disabilities.

Symptoms of Heat Illness:

  • Swelling, rash, cramps, fainting, heat exhaustion, heat stroke, and worsening health conditions.


  • Stay hydrated, drink water regularly.
  • Never leave children or pets in parked vehicles.

Forecast Overview


A mix of sun and cloud with a 40% chance of showers this afternoon and a risk of thunderstorms. Winds will become west at 20 km/h late this afternoon. The high will be 30°C with a humidex of 38. The UV index is very high at 10.


Cloudy with a 40% chance of showers early this evening. Rain will begin overnight with a risk of thunderstorms. Winds will shift to the north at 20 km/h this evening. The low will be 19°C.

Wednesday, July 10

Rain with a risk of thunderstorms. Local rainfall amounts between 30 to 40 mm. Winds will become east at 30 km/h late in the morning. The high will be 23°C with a humidex of 28. The UV index will be low at 2. Periods of rain are expected at night, with a low of 18°C.

Thursday, July 11

Cloudy with a 60% chance of rain. The high will be 25°C. Cloudy periods at night with a low of 18°C.

Friday, July 12

A mix of sun and cloud with a high of 28°C. Cloudy periods at night with a low of 18°C.

Wardrobe Suggestions

With high temperatures and humidity, lightweight, breathable clothing is recommended. Sunscreen, hats, and sunglasses are essential for UV protection. Carry an umbrella or raincoat for potential showers today and heavy rain tomorrow. Stay hydrated and avoid strenuous activities during peak heat.

Historical Weather

On this date, Toronto’s highest recorded temperature was 36.2°C, and the lowest was 11.4°C. Today’s temperatures and weather conditions are within the expected range for this time of year.

Weather Trivia

Did you know that Toronto experiences an average of 301 hours of sunshine in July? Despite the occasional rainfall, the city enjoys a significant amount of summer sun.

Previous articleThe Psychological Effects of Testosterone Replacement Therapy
Next articleGreater Sudbury Weather: Misty Morning with Showers and Thunderstorms Possible