Trader consensus on Toronto's highest temperature on March 25 clusters tightly around 3-5°C at over 65% implied probability, driven by ensemble forecasts from Environment Canada’s GEM model and global counterparts like GFS and ECMWF, which project mean highs near 4°C amid lingering Arctic air masses. Differentiating factors include northerly flow risks favoring 3°C outcomes via cold advection, countered by potential Lake Ontario moderation and weak ridging boosting 5°C chances; recent 12Z runs slightly warmed the outlook, narrowing the spread from prior chillier biases. Historical March norms (~6°C) and model uncertainty from stratospheric warming signals keep 6°C+ viable at 17.5% but subordinate, with traders eyeing evening forecast updates for resolution shifts.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Toronto on March 25?
Highest temperature in Toronto on March 25?
5°C 23%
3°C 21%
4°C 21%
6°C 16%
0°C or below
5%
1°C
12%
2°C
13%
3°C
21%
4°C
21%
5°C
23%
6°C
16%
7°C
14%
8°C
13%
9°C
10%
10°C or higher
2%
5°C 23%
3°C 21%
4°C 21%
6°C 16%
0°C or below
5%
1°C
12%
2°C
13%
3°C
21%
4°C
21%
5°C
23%
6°C
16%
7°C
14%
8°C
13%
9°C
10%
10°C or higher
2%
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 Toronto's highest temperature on March 25 clusters tightly around 3-5°C at over 65% implied probability, driven by ensemble forecasts from Environment Canada’s GEM model and global counterparts like GFS and ECMWF, which project mean highs near 4°C amid lingering Arctic air masses. Differentiating factors include northerly flow risks favoring 3°C outcomes via cold advection, countered by potential Lake Ontario moderation and weak ridging boosting 5°C chances; recent 12Z runs slightly warmed the outlook, narrowing the spread from prior chillier biases. Historical March norms (~6°C) and model uncertainty from stratospheric warming signals keep 6°C+ viable at 17.5% but subordinate, with traders eyeing evening forecast updates for resolution shifts.
Experimental AI-generated summary referencing Polymarket data · Updated
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