Environment Canada and major forecast models like the GFS and GEM consensus project a high temperature of exactly 6°C for Toronto on March 25, reflecting a cold air mass ushering periods of flurries and northwest winds limiting daytime warming. Current upper-air analyses show strong cold advection over the Great Lakes region, with surface observations aligning on chilly conditions after recent milder spells. This drives the 99.9% market-implied probability for 6°C as traders weigh historical March norms (average high ~6°C) against low variability in short-range guidance. Realistic challenges include unexpected clearing skies boosting solar heating by 1-2°C or a stalled front shifting winds southerly, though ensemble spreads remain tight; watch tomorrow's 12Z model runs for refinements.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Toronto on March 25?
Highest temperature in Toronto on March 25?
6°C 99.9%
7°C <1%
8°C <1%
9°C <1%
$94,773 Vol.
$94,773 Vol.
6°C
100%
7°C
<1%
8°C
<1%
9°C
<1%
10°C or higher
<1%
6°C 99.9%
7°C <1%
8°C <1%
9°C <1%
$94,773 Vol.
$94,773 Vol.
6°C
100%
7°C
<1%
8°C
<1%
9°C
<1%
10°C or higher
<1%
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Toronto Pearson Intl Airport Station once information is finalized, available here: https://www.wunderground.com/history/daily/ca/mississauga/CYYZ.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve to "Yes" until all data for this date has been finalized.
The resolution source for this market measures temperatures to whole degrees Celsius (eg, 9°C). Thus, this is the level of precision that will be used when resolving the market.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Mar 21, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Environment Canada and major forecast models like the GFS and GEM consensus project a high temperature of exactly 6°C for Toronto on March 25, reflecting a cold air mass ushering periods of flurries and northwest winds limiting daytime warming. Current upper-air analyses show strong cold advection over the Great Lakes region, with surface observations aligning on chilly conditions after recent milder spells. This drives the 99.9% market-implied probability for 6°C as traders weigh historical March norms (average high ~6°C) against low variability in short-range guidance. Realistic challenges include unexpected clearing skies boosting solar heating by 1-2°C or a stalled front shifting winds southerly, though ensemble spreads remain tight; watch tomorrow's 12Z model runs for refinements.
Experimental AI-generated summary referencing Polymarket data · Updated
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