Official measurements from Environment Canada at Toronto Pearson International Airport recorded a daily maximum of 21°C on May 16, 2026, establishing the market-implied consensus around that threshold with near-certainty. This outcome aligns with observed conditions under a stable high-pressure system that limited daytime heating despite spring climatology favoring averages near 18–20°C. Historical data for mid-May shows similar cool spells when northerly flow suppresses temperatures, and no model revisions or station discrepancies have emerged to alter the verified reading. While rare post-event adjustments to archived data could theoretically shift the result, current official records leave little room for alternative outcomes above 21°C.
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 May 16?
21°C 100.0%
16°C or below <1%
17°C <1%
18°C <1%
$146,994 Vol.
$146,994 Vol.
16°C or below
No
17°C
No
18°C
No
19°C
No
20°C
No
21°C
Yes
22°C
No
23°C
No
24°C
No
25°C
No
26°C or higher
No
21°C 100.0%
16°C or below <1%
17°C <1%
18°C <1%
$146,994 Vol.
$146,994 Vol.
16°C or below
No
17°C
No
18°C
No
19°C
No
20°C
No
21°C
Yes
22°C
No
23°C
No
24°C
No
25°C
No
26°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: May 14, 2026, 12:05 AM ET
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Outcome proposed: Yes
No dispute
Final outcome: Yes
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: Yes
No dispute
Final outcome: Yes
Official measurements from Environment Canada at Toronto Pearson International Airport recorded a daily maximum of 21°C on May 16, 2026, establishing the market-implied consensus around that threshold with near-certainty. This outcome aligns with observed conditions under a stable high-pressure system that limited daytime heating despite spring climatology favoring averages near 18–20°C. Historical data for mid-May shows similar cool spells when northerly flow suppresses temperatures, and no model revisions or station discrepancies have emerged to alter the verified reading. While rare post-event adjustments to archived data could theoretically shift the result, current official records leave little room for alternative outcomes above 21°C.
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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