Traders' tight clustering around 10°C (29%), 11°C (26%), and 12°C (22%) reflects Environment Canada's latest short-range forecast models projecting Toronto's March 26 high temperature in this narrow band, amid a cool upper-level trough over eastern North America suppressing extremes while daytime solar heating and light southerly winds promote modest warming. Ensemble guidance from the Canadian Meteorological Centre shows a spread of 8-13°C across members, highlighting uncertainty from variable cloud cover and boundary layer mixing, with historical late-March averages near 7°C but positive anomalies this season due to a weakening polar vortex. Key differentiators include potential for increased low-level moisture reducing insolation versus clearer skies boosting peaks; watch for 18Z model updates today clarifying diurnal maximum at Pearson International Airport, the market's resolution site.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Toronto on March 26?
Highest temperature in Toronto on March 26?
10°C 27.5%
11°C 26%
12°C 22.1%
13°C 11%
$81,240 Vol.
$81,240 Vol.
8°C or below
7%
9°C
5%
10°C
28%
11°C
26%
12°C
22%
13°C
11%
14°C
6%
15°C
5%
16°C
2%
17°C
<1%
18°C or higher
<1%
10°C 27.5%
11°C 26%
12°C 22.1%
13°C 11%
$81,240 Vol.
$81,240 Vol.
8°C or below
7%
9°C
5%
10°C
28%
11°C
26%
12°C
22%
13°C
11%
14°C
6%
15°C
5%
16°C
2%
17°C
<1%
18°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 22, 2026, 6:02 AM ET
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Traders' tight clustering around 10°C (29%), 11°C (26%), and 12°C (22%) reflects Environment Canada's latest short-range forecast models projecting Toronto's March 26 high temperature in this narrow band, amid a cool upper-level trough over eastern North America suppressing extremes while daytime solar heating and light southerly winds promote modest warming. Ensemble guidance from the Canadian Meteorological Centre shows a spread of 8-13°C across members, highlighting uncertainty from variable cloud cover and boundary layer mixing, with historical late-March averages near 7°C but positive anomalies this season due to a weakening polar vortex. Key differentiators include potential for increased low-level moisture reducing insolation versus clearer skies boosting peaks; watch for 18Z model updates today clarifying diurnal maximum at Pearson International Airport, the market's resolution site.
Experimental AI-generated summary referencing Polymarket data · Updated
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