Official observations from Environment and Climate Change Canada at Toronto Pearson International Airport confirm a maximum temperature of 16°C on April 17, 2026, driving the market's 100% implied probability for this outcome as traders price in verified hourly data peaking in the mid-afternoon amid partly cloudy skies and light winds. This aligns with pre-event forecasts from NOAA and Canadian models anticipating mild spring conditions near seasonal norms, where April highs typically average 11–13°C but can reach 16°C during brief warm surges. Realistic challenges are minimal post-event, limited to rare official revisions from sensor recalibrations or data audits, with final daily summaries expected within 24–48 hours to lock in resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Toronto on April 17?
Highest temperature in Toronto on April 17?
16°C 100.0%
15°C or below <1%
17°C <1%
18°C <1%
$113,323 Vol.
$113,323 Vol.
15°C or below
No
16°C
Yes
17°C
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
No
23°C
No
24°C
No
25°C or higher
No
16°C 100.0%
15°C or below <1%
17°C <1%
18°C <1%
$113,323 Vol.
$113,323 Vol.
15°C or below
No
16°C
Yes
17°C
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
No
23°C
No
24°C
No
25°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: Apr 15, 2026, 12:05 AM 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
Official observations from Environment and Climate Change Canada at Toronto Pearson International Airport confirm a maximum temperature of 16°C on April 17, 2026, driving the market's 100% implied probability for this outcome as traders price in verified hourly data peaking in the mid-afternoon amid partly cloudy skies and light winds. This aligns with pre-event forecasts from NOAA and Canadian models anticipating mild spring conditions near seasonal norms, where April highs typically average 11–13°C but can reach 16°C during brief warm surges. Realistic challenges are minimal post-event, limited to rare official revisions from sensor recalibrations or data audits, with final daily summaries expected within 24–48 hours to lock in resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
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