Trader consensus on Polymarket has locked in a 100% implied probability for a highest temperature of exactly 10°C at Toronto Pearson International Airport on April 1, backed by Environment Canada's official hourly observations showing that precise maximum amid persistent cloud cover and northerly winds gusting to 20 km/h, which capped daytime heating after an overnight start near 9°C. This aligns with pre-event forecasts from the Canadian Meteorological Centre's models, which projected highs near 10°C under a cool air mass influenced by a lingering high-pressure ridge over the Great Lakes region—consistent with early April climatology where average highs hover around 11°C but variability from synoptic patterns often yields such outcomes. With data now verified from the airport's automated sensors, no realistic scenarios challenge this positioning barring rare post hoc revisions from quality control audits.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Toronto on April 1?
Highest temperature in Toronto on April 1?
10°C 100.0%
4°C or below <1%
5°C <1%
6°C <1%
$399,779 Vol.
$399,779 Vol.
4°C or below
No
5°C
No
6°C
No
7°C
No
8°C
No
9°C
No
10°C
Yes
11°C
No
12°C
No
13°C
No
14°C or higher
No
10°C 100.0%
4°C or below <1%
5°C <1%
6°C <1%
$399,779 Vol.
$399,779 Vol.
4°C or below
No
5°C
No
6°C
No
7°C
No
8°C
No
9°C
No
10°C
Yes
11°C
No
12°C
No
13°C
No
14°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 29, 2026, 1:53 PM ET
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: 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.
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Trader consensus on Polymarket has locked in a 100% implied probability for a highest temperature of exactly 10°C at Toronto Pearson International Airport on April 1, backed by Environment Canada's official hourly observations showing that precise maximum amid persistent cloud cover and northerly winds gusting to 20 km/h, which capped daytime heating after an overnight start near 9°C. This aligns with pre-event forecasts from the Canadian Meteorological Centre's models, which projected highs near 10°C under a cool air mass influenced by a lingering high-pressure ridge over the Great Lakes region—consistent with early April climatology where average highs hover around 11°C but variability from synoptic patterns often yields such outcomes. With data now verified from the airport's automated sensors, no realistic scenarios challenge this positioning barring rare post hoc revisions from quality control audits.
Experimental AI-generated summary referencing Polymarket data · Updated
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