Warmest temperature anomaly in the world will be found in Canada
Discover why Ontario and Quebec are experiencing the warmest anomaly on Earth this week, with temperatures soaring 10-15 degrees above normal.
An exceptional stretch of warm weather has reminded many people to check their calendars again as we kick off November.
Potentially record-setting warmth is bringing daytime highs to parts of Ontario and Quebec that are as much as 10-16 degrees above seasonal. As a result, Ontario and Quebec are expected to see the warmest temperature anomaly in the world this week.
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Some southern Ontario locales have already seen the thermometer creep into the 20s, with a chance of up to 25°C, whereas normally, we'd expect to see highs around 9°C or 10°C. It's not just the daytime highs that are exceptional, the overnight lows have the chance to set new records, too.
Record-breaking start to November in southern Ontario
Daytime highs will approach or exceed 20°C for many communities, with even a slight chance for a station or two to reach 25°C. Over the next five days, it’s likely some communities will have their warmest start to November on record, rivaling 1956 and 2022.
Pearson International Airport set its monthly temperature record on Nov. 5, 2002, when they hit 25.1°C for a daytime high.
Looking deeper into the history books, multiple cities in southern Ontario started November 1956 by notching their warmest-ever first five days of the month.
As well, many overnight, warmest-minimum temperature records for the month of November will be broken or challenged over the next two days.
Cities looking at their temperature low records being broken:
Toronto:
Forecast: 15°C Wednesday
Record: 15.1°C (2024)
London:
Forecast: 15°C Tuesday overnight
Record: 15.5°C (2024)
Windsor:
Forecast: 17°C Tuesday overnight
Record: 16°C (2024)
Wednesday will be the peak of the heat for northeastern Ontario, with values to be as high as 10-16 degrees above seasonal across the region and in western Quebec.
The high values are expected to be the warmest temperature anomaly in the entire world.
Temperatures across northeastern Ontario and western Quebec are forecast to be in the high teens or low 20s on Wednesday. Normal highs for this time of year are around 9°C or 10°C.
The setup? A strong, high-pressure ridge off the U.S. east coast and the warm front associated with a Colorado low is flooding the region with warmer air.
With files from Rhythm Reet, a meteorologist at The Weather Network.
Stay with The Weather Network for the latest updates and information on your weather across Ontario.