Today – May 21, 2024
A mix of sun and cloud. 40 percent chance of showers this afternoon with risk of a thunderstorm. Wind becoming southwest 20 km/h late this afternoon. High 31. Humidex 37. UV index 8 or very high.
Special weather statement
Hot and humid conditions expected today.
A hot and humid airmass is moving into southwestern Ontario. Maximum temperatures of 31 degrees Celsius are expected today with overnight minimum temperatures near 21 degrees Celsius.
Slightly cooler temperatures are expected Wednesday as showers and thunderstorms are possible through the day. As a result, the hot and humid conditions are not expected to reach heat warning criteria.
These conditions pose a health risk when you are not used to the heat. Everyone is at risk from heat, especially older adults; infants and young children; and people with chronic illnesses. You are advised to 1) drink plenty of cool liquids before feeling thirsty; and 2) keep cool by dressing for the weather and spending more time in a cool place.
Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@ec.gc.ca or tweet reports using #ONStorm.
Tonight
Partly cloudy. 30 percent chance of showers early this evening and before morning. Risk of a thunderstorm. Wind south 20 km/h. Low 22.
Wed, 22 May – A mix of sun and cloud with 40 percent chance of showers and risk of a thunderstorm. Wind southwest 20 km/h gusting to 40. High 27. Humidex 32. UV index 9 or very high. Night – Cloudy periods with 60 percent chance of showers. Low 17.
Thu, 23 May – Sunny. High 25. Night – Clear. Low 12.
Fri, 24 May – Sunny. High 24. Night – Cloudy periods. Low 12.
Sat, 25 May – A mix of sun and cloud. High 25. Night – Cloudy periods. Low 16.
Sun, 26 May – Cloudy. High 26. Night – Cloudy. Low 16.
Mon, 27 May – Cloudy. High 25.
