Trader consensus on Polymarket tilts toward a 6°C high in Toronto on March 25 at 36% implied probability, narrowly ahead of 5°C (26.5%) and 7°C (21%), propelled by Environment Canada's latest forecast capping daytime maxima near 6°C under persistent cloud cover and light southerly flow. Major models like ECMWF and GFS ensembles converge on 5-7°C means, reflecting typical late-March climatology with historical averages around 6°C at Pearson Airport, but diverge on boundary-layer mixing and mid-level trough timing—ECMWF leans warmer via ridging, GFS cooler from vorticity advection. Low-confidence signals from recent 12Z runs underscore tight odds, with cloud forcing as the key differentiator for resolution.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Toronto on March 25?
Highest temperature in Toronto on March 25?
6°C 37%
5°C 27%
7°C 21%
4°C 8.2%
$26,303 Vol.
$26,303 Vol.
0°C or below
<1%
1°C
<1%
2°C
1%
3°C
1%
4°C
8%
5°C
27%
6°C
37%
7°C
21%
8°C
4%
9°C
1%
10°C or higher
1%
6°C 37%
5°C 27%
7°C 21%
4°C 8.2%
$26,303 Vol.
$26,303 Vol.
0°C or below
<1%
1°C
<1%
2°C
1%
3°C
1%
4°C
8%
5°C
27%
6°C
37%
7°C
21%
8°C
4%
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...Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Trader consensus on Polymarket tilts toward a 6°C high in Toronto on March 25 at 36% implied probability, narrowly ahead of 5°C (26.5%) and 7°C (21%), propelled by Environment Canada's latest forecast capping daytime maxima near 6°C under persistent cloud cover and light southerly flow. Major models like ECMWF and GFS ensembles converge on 5-7°C means, reflecting typical late-March climatology with historical averages around 6°C at Pearson Airport, but diverge on boundary-layer mixing and mid-level trough timing—ECMWF leans warmer via ridging, GFS cooler from vorticity advection. Low-confidence signals from recent 12Z runs underscore tight odds, with cloud forcing as the key differentiator for resolution.
Experimental AI-generated summary referencing Polymarket data · Updated
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