Official hourly observations from Environment Canada at Toronto Pearson International Airport—the designated station for this market—confirm the highest temperature on April 18 reached exactly 20°C at 2:00 PM EDT, amid partly cloudy skies, northwest winds around 15-20 km/h, and moderating highs after midday. This precise measurement, captured by automated sensors and standard meteorological protocols, underpins the trader consensus implying 100% probability for 20°C, reflecting the skin-in-the-game wisdom of prediction markets on resolved weather outcomes. While final daily summaries undergo routine quality control within 24-48 hours, realistic challenges would require rare instrument recalibration or data anomaly detection shifting the max beyond 20°C, a scenario with negligible historical precedent at this major airport site.
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 18?
Highest temperature in Toronto on April 18?
20°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$178,391 Vol.
$178,391 Vol.
Apr 18, 2026
11°C or below
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C
No
20°C
Yes
21°C or higher
No
20°C 100.0%
11°C or below <1%
12°C <1%
13°C <1%
$178,391 Vol.
$178,391 Vol.
Apr 18, 2026
11°C or below
$9,892 Vol.
No
12°C
$5,689 Vol.
No
13°C
$5,341 Vol.
No
14°C
$5,915 Vol.
No
15°C
$10,357 Vol.
No
16°C
$13,730 Vol.
No
17°C
$13,538 Vol.
No
18°C
$9,377 Vol.
No
19°C
$28,607 Vol.
No
20°C
$50,845 Vol.
Yes
21°C or higher
$25,099 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the Toronto Pearson Intl Airport Station in degrees Celsius on 18 Apr '26.
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.Official hourly observations from Environment Canada at Toronto Pearson International Airport—the designated station for this market—confirm the highest temperature on April 18 reached exactly 20°C at 2:00 PM EDT, amid partly cloudy skies, northwest winds around 15-20 km/h, and moderating highs after midday. This precise measurement, captured by automated sensors and standard meteorological protocols, underpins the trader consensus implying 100% probability for 20°C, reflecting the skin-in-the-game wisdom of prediction markets on resolved weather outcomes. While final daily summaries undergo routine quality control within 24-48 hours, realistic challenges would require rare instrument recalibration or data anomaly detection shifting the max beyond 20°C, a scenario with negligible historical precedent at this major airport site.
This market will resolve to the temperature range that contains the highest temperature recorded at the Toronto Pearson Intl Airport Station in degrees Celsius on 18 Apr '26.
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.
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 16, 2026, 12:26 AM ET
Volume
$178,391End Date
Apr 18, 2026Market Opened
Apr 16, 2026, 12:26 AM ETResolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the Toronto Pearson Intl Airport Station in degrees Celsius on 18 Apr '26.
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.Official hourly observations from Environment Canada at Toronto Pearson International Airport—the designated station for this market—confirm the highest temperature on April 18 reached exactly 20°C at 2:00 PM EDT, amid partly cloudy skies, northwest winds around 15-20 km/h, and moderating highs after midday. This precise measurement, captured by automated sensors and standard meteorological protocols, underpins the trader consensus implying 100% probability for 20°C, reflecting the skin-in-the-game wisdom of prediction markets on resolved weather outcomes. While final daily summaries undergo routine quality control within 24-48 hours, realistic challenges would require rare instrument recalibration or data anomaly detection shifting the max beyond 20°C, a scenario with negligible historical precedent at this major airport site.
This market will resolve to the temperature range that contains the highest temperature recorded at the Toronto Pearson Intl Airport Station in degrees Celsius on 18 Apr '26.
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.
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.
Volume
$178,391End Date
Apr 18, 2026Market Opened
Apr 16, 2026, 12:26 AM ETResolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official hourly observations from Environment Canada at Toronto Pearson International Airport—the designated station for this market—confirm the highest temperature on April 18 reached exactly 20°C at 2:00 PM EDT, amid partly cloudy skies, northwest winds around 15-20 km/h, and moderating highs after midday. This precise measurement, captured by automated sensors and standard meteorological protocols, underpins the trader consensus implying 100% probability for 20°C, reflecting the skin-in-the-game wisdom of prediction markets on resolved weather outcomes. While final daily summaries undergo routine quality control within 24-48 hours, realistic challenges would require rare instrument recalibration or data anomaly detection shifting the max beyond 20°C, a scenario with negligible historical precedent at this major airport site.
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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