The fall season is right around the corner, but you wouldn't know it if you've been in southern Ontario the past few days.
Heat and humidity blanketed the region as Environment Canada issued humidex advisories for cities like Essex and Chatham-Kent. Windsor felt closer to 41 with the humidity on Thursday.
By Friday morning, the advisory was extended through to Parry Sound and the Greater Toronto Area including York Region and Durham Region. A heat alert was also in effect for both the City of Hamilton and the Halton region. During the afternoon hours, Sarnia felt oppressive at 45.
The heavy particles in the air also lead to a smog advisory for parts of the southwest.
Officials asked people to relax and stay indoors. To spare the air, they suggested residents take public transit or car pool.
According to meteorologists here at The Weather Network, the heat is expected to linger for the start of the long weekend, but it won't hold steady.
“We're roughly looking at a 10 degree swing between Sunday and Monday through southern Ontario up through the 401 corridor into Ottawa and Montreal,” explains meteorologist Rob Davis.
There are a few reasons why the temperature drop will be so significant says Amanda de Monte, another meteorologist here at The Weather Network.
“First, we have high pressure to our west which circulates air clockwise. Then low pressure to our east which moves the air counter clockwise around the low -- essentially this is a double dose of cooler air.”
The drop will make conditions feel crisper for Monday and for the first few days of the new school year.
“Really the first full week of September will essentially feel like fall,” warns Davis.
To stay up-to-date on the weather in your area, head to the Ontario Cities Index.