Traders overwhelmingly back 13°C (99.6% implied probability) as Toronto's highest temperature on March 16, driven by converging forecasts from Environment and Climate Change Canada and global models like ECMWF and GFS, which project daytime highs peaking precisely at 13°C amid partly cloudy skies and light southerly winds. Ensemble predictions show tight clustering around 12-14°C, with low wind shear and stable upper-air patterns minimizing deviations typical in mid-March's variable synoptic conditions. Historical data reinforces reliability, as short-range (24-48 hour) temperature forecasts for Toronto achieve 90%+ accuracy within 2°C. Challenges could arise from an unforeseen warm front or nocturnal inversion breakdown pushing 14°C+, but current geopotential height analyses indicate scant risk.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Toronto on March 16?
Highest temperature in Toronto on March 16?
13°C 100.0%
5°C or below <1%
6°C <1%
7°C <1%
$28,416 Vol.
$28,416 Vol.
5°C or below
No
6°C
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C
No
12°C
No
13°C
Yes
14°C
No
15°C or higher
No
13°C 100.0%
5°C or below <1%
6°C <1%
7°C <1%
$28,416 Vol.
$28,416 Vol.
5°C or below
No
6°C
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C
No
12°C
No
13°C
Yes
14°C
No
15°C or higher
No
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 13, 2026, 3:17 PM ET
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Traders overwhelmingly back 13°C (99.6% implied probability) as Toronto's highest temperature on March 16, driven by converging forecasts from Environment and Climate Change Canada and global models like ECMWF and GFS, which project daytime highs peaking precisely at 13°C amid partly cloudy skies and light southerly winds. Ensemble predictions show tight clustering around 12-14°C, with low wind shear and stable upper-air patterns minimizing deviations typical in mid-March's variable synoptic conditions. Historical data reinforces reliability, as short-range (24-48 hour) temperature forecasts for Toronto achieve 90%+ accuracy within 2°C. Challenges could arise from an unforeseen warm front or nocturnal inversion breakdown pushing 14°C+, but current geopotential height analyses indicate scant risk.
Experimental AI-generated summary referencing Polymarket data · Updated
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