Today – July 19, 2020
A mix of sun and cloud. 40 percent chance of showers late this morning and this afternoon with risk of a thunderstorm. Wind becoming southwest 30 km/h gusting to 50 this morning. High 34. Humidex 46.
Tonight
Partly cloudy with 30 percent chance of showers this evening and risk of a thunderstorm. Clearing overnight. Wind west 20 km/h becoming light late this evening. Low 21.
Heat warning
A hot and humid air mass will continue to affect extreme southwestern Ontario through at least Monday. Slightly cooler and less humid conditions may arrive on Tuesday.
Daytime high temperatures: 31 to 34 degrees Celsius
Overnight low temperatures: 21 to 24 degrees Celsius
Humidex values: low 40s today; high 30s Monday
Hot and humid air can also bring deteriorating air quality and can result in the Air Quality Health Index approaching the high risk category.
Watch for the effects of heat illness: swelling, rash, cramps, fainting, heat exhaustion, heat stroke and the worsening of some health conditions.
Never leave people or pets inside a parked vehicle.
When it’s hot eat cool, light meals.
Outdoor workers should take regularly scheduled breaks in a cool place.
Heat warnings are issued when very high temperature or humidity conditions are expected to pose an elevated risk of heat illnesses, such as heat stroke or heat exhaustion.
Please continue to monitor alerts and forecasts issued by Environment Canada. To report severe weather, send an email to ONstorm@canada.ca or tweet reports using #ONStorm.
Mon, 20 Jul – Sunny. Becoming a mix of sun and cloud near noon. Wind becoming west 20 km/h near noon. High 30. Humidex 37. Night – Cloudy. Low 20.
Tue, 21 Jul – Cloudy. High 26. Night – Cloudy with 40 percent chance of showers. Low 20.
Wed, 22 Jul – A mix of sun and cloud. High 27. Night – Clear. Low 21.
Thu, 23 Jul – A mix of sun and cloud. High 30. Night – Cloudy periods. Low 19.
Fri, 24 Jul – A mix of sun and cloud. High 31. Night – Cloudy periods. Low 21.
Sat, 25 Jul – A mix of sun and cloud. High 32.
