Eureka hits deep freeze with Canada's first -30ºC of the season
The High Arctic station has done it again, registering bone-chilling temperatures as the rest of Canada prepares for winter's return.
Eureka, Nunavut, is back in its traditional position at the top of Canada's coldest list. On Nov. 2, 2025, the remote weather station recorded -30.5°C, the nation's first -30°C reading of the season.
Eureka, located on Ellesmere Island, has a history of establishing freezing records. Just weeks earlier, it recorded Canada's first -20°C of the fall, following the country's first -10°C in nearby Isachsen around early September.
By late September, the town had already bid farewell to the sun, which set for the last time on Sept. 20 and will not rise again until February.
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A regular at the cold club
Eureka is consistently one of the first spots in Canada to reach -30°C each year, thanks to its long arctic night and open skies, which allow temperatures to drop.
The site's earliest -30°C was on Sept. 25, 1961 (-31.7°C) and the latest was on Nov. 12, 2021 (-33.3°C), both stark reminders of how quickly winter may set in here.
Still, this latest reading is mild in comparison to its all-time low of -55.3°C, reached on Feb. 15, 1979.
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Cold air on the move
The same Arctic air mass that froze Eureka is now spreading southward. Meteorologists believe the cold lobe is moving into northern Manitoba, Hudson Bay and northeastern Ontario.
While southern Canada is unlikely to be affected right away, the first true tastes of winter are starting to arrive from the north—and Eureka has once again rung the seasonal alarm.
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