There Could Be A Huge 20 C Difference Between North & South Ontario This Week
Whether you spend this week sweating or shivering will depend on exactly where you live. Ontarioâs weather is about to get pretty inconsistent, and there could be a 20 C difference between the north and south. With rain, thunderstorms, wind and sun all in the forecast, things are going to get confusing.
If you live in Ontario, youâll need to be prepared with sunscreen, an umbrella, a winter coat and your gloves this week.
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According to The Weather Networkâs forecast for the upcoming days, conditions are going to get pretty intense, thanks to a boundary in northern Ontario that could lead to an airmass clash.
Continuing Monday and through the rest of the week, itâs going to cause a huge temperature difference between the northern and southern regions of the province.Â
If youâre in the south, youâre in luck. Daytime temperatures in this area are expected to reach almost 30 C on Wednesday, with regular peeks of sunshine towards the end of the week.
On the northern side, things arenât so pleasant.
Some places will be âstuck in the single digitsâ for several days, and will experience regular showers, thunderstorms and strong winds. Yikes!
After a stormy night in the GTA, residents will be waking up to a pretty grey and windy Labour Day.
However, by late afternoon this drizzle will have moved on, leaving behind a non-severe storm threat for eastern Ontario into the evening.
By Tuesday, warmer temperatures and showers will return to the region, bringing a chance of thunderstorms to the Great Lakes.
By Wednesday, itâs going to get pretty sweaty in the area, with temperatures approaching 30 C. Itâs likely to feel even warmer with the humidity.
Conversely, parts of northern Ontario will experience conditions in the single digits, dropping to around 20 C lower than the opposite end of the province.
âA large range in temperatures over a short distance is likely,â explains The Weather Network.
That said, this huge difference wonât stick around for long. By the end of the week, temperatures will balance out across the province and cooler conditions will prevail.
Stay warm, Ontario!
*This article's cover image is for illustrative purposes only.

L'évacuation du Cégep de Saint-Hyacinthe entraine aussi la fermeture de certaines rues dans le secteur ce 20 octobre 2026.