Environment Canada's latest forecast drives the 61.5% implied probability for Toronto's highest temperature on March 27 reaching 3°C or higher, projecting a daytime peak near 5°C under mild southerly winds and partial clearing after recent cloud cover. Ensemble models from ECMWF and GFS align on above-freezing highs, supported by overnight lows holding above -2°C in recent observations, contrasting cooler lake-effect influences that buoy 2°C (20%) and 1°C (18%) as backups. Historical late-March averages around 6°C reinforce warming bias, though diurnal swings from urban heat and frontal passages introduce uncertainty; traders await afternoon updates for resolution tweaks.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Toronto on March 27?
Highest temperature in Toronto on March 27?
3°C or higher 50%
0°C 28%
2°C 17%
-4°C 13%
-7°C or below
1%
-6°C
4%
-5°C
6%
-4°C
13%
-3°C
5%
-2°C
4%
-1°C
3%
0°C
16%
1°C
10%
2°C
17%
3°C or higher
62%
3°C or higher 50%
0°C 28%
2°C 17%
-4°C 13%
-7°C or below
1%
-6°C
4%
-5°C
6%
-4°C
13%
-3°C
5%
-2°C
4%
-1°C
3%
0°C
16%
1°C
10%
2°C
17%
3°C or higher
62%
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 23, 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...Environment Canada's latest forecast drives the 61.5% implied probability for Toronto's highest temperature on March 27 reaching 3°C or higher, projecting a daytime peak near 5°C under mild southerly winds and partial clearing after recent cloud cover. Ensemble models from ECMWF and GFS align on above-freezing highs, supported by overnight lows holding above -2°C in recent observations, contrasting cooler lake-effect influences that buoy 2°C (20%) and 1°C (18%) as backups. Historical late-March averages around 6°C reinforce warming bias, though diurnal swings from urban heat and frontal passages introduce uncertainty; traders await afternoon updates for resolution tweaks.
Experimental AI-generated summary referencing Polymarket data · Updated
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