Summer-like temperatures continue in southern and northeastern Ontario

It is October but the abnormally high temperature is making it feel like July in much of Ontario for a few more days, so don’t turn off you AC just yet.

Rob Kuhn, a severe weather meteorologist at Environment and Climate Change Canada, says the normal high temperature for the first week of October is between 15 and 17 C, but this weekend’s highs could reach around 27 to 30 C across southern Ontario.

Kuhn says such weather patterns aren’t unprecedented as highs into the 20s and up to 30 C have been recorded in the past, but Ontarians don’t get to experience July-like temperatures in October too often.

He says the highest temperature recorded in southern Ontario was 30 C to 31 C and the highs of this weekend could get close to that or even set new daily records for Saturday to Monday in some areas including in Toronto and Ottawa.

The ECCC meteorologist says the showers forecasted for Tuesday are expected to bring the temperature down the next day to nearly normal for early October.

Kuhn says some areas in northeast Ontario, such as Sudbury, Timmins and Sault Ste. Marie, will also experience hotter than normal days with the temperature ranging between 26 and 29 C.

He said while the unseasonably warm weekend is a chance for Ontarians to spend time on the beaches before it gets cold, beachgoers should be aware that the water might not be as warm as the air feels.

“It’s perfect for going to the beach, enjoying a midsummer day in October,” he said in a phone interview.

“The water in the Great Lakes will not be as warm as it was in the midsummer, so they should be aware of that, but it may still be, you know, decent enough that some folks might actually go in or at least wade into the water.”

This report by The Canadian Press was first published Oct. 4, 2025.

Sharif Hassan, The Canadian Press