Canada races to the end of summer as final 30-degree temperature nears
Where in Canada will we see the year’s final 30°C reading?
It’s the end of summer and many parts of Canada have already seen quite the chill. Even as frost pops up for some areas, summer-like heat isn’t done with us just yet.
We started the season by watching which community would notch the country’s first 30°C temperature of the year.
But who’s on track to secure the final 30-degree reading of 2025?
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Direct sunlight will slip below the equator for six long months after the autumnal equinox arrives on Monday, Sept. 22. Heat is harder to come by with the loss of daylight this time of year.
Significant warmth has to migrate into Canada from the south during the cooler months. Large low-pressure systems are the main source for above-seasonal temperatures across Eastern Canada, for example.
We’ve already passed the average date of the last 30°C temperature for all of Canada’s major cities.
Historically, Edmonton experiences the year’s final 30-degree reading by Aug. 1. That date slips to Sept. 1 farther south in Saskatoon, with the second week of September featuring the last of the significant heat in Toronto.
Occasional bouts of summer-like heat are possible late into the season, though. Red Deer, Alta., saw a daytime high in the 30s as late as Sept. 27 one year. Similar highs have occurred into the first half of October in Kamloops, Toronto, and Halifax.
The all-time latest we’ve seen a community hit that mark in Canada was October 25, 1924, when Maple Creek, Sask., climbed up to an impressive 30.6°C.
This year’s final 30-degree reading appears most likely across Western Canada, where yet another ridge of high pressure will build through the final days of September.
Several communities in southern Alberta and the B.C. Interior will vie for the title as temperatures climb close to the milestone mark.
Header image created using graphics and imagery from Canva.