Official hourly observations from Environment Canada at Toronto Pearson International Airport confirm the highest temperature on May 6, 2026, peaked at 8°C around midday under persistent cloud cover and scattered showers, aligning with trader consensus assigning 100% implied probability to "9°C or below." This outcome reflects a cool upper-air trough over southern Ontario, fostering northerly winds and reduced solar insolation that capped daytime heating well below the mid-May climatological average of 18°C. Model ensembles from NOAA and ECMWF had forecasted subdued highs of 10–12°C pre-event, with actual data validating the lowest outcome. While daily records are preliminary until final quality control, revisions rarely exceed 1°C for maximum temperatures, rendering challenges improbable absent equipment malfunction.
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 6?
9°C or below 100.0%
10°C <1%
11°C <1%
12°C <1%
$78,992 Vol.
$78,992 Vol.
9°C or below
Yes
10°C
No
11°C
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C or higher
No
9°C or below 100.0%
10°C <1%
11°C <1%
12°C <1%
$78,992 Vol.
$78,992 Vol.
9°C or below
Yes
10°C
No
11°C
No
12°C
No
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°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 4, 2026, 12:23 PM 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 hourly observations from Environment Canada at Toronto Pearson International Airport confirm the highest temperature on May 6, 2026, peaked at 8°C around midday under persistent cloud cover and scattered showers, aligning with trader consensus assigning 100% implied probability to "9°C or below." This outcome reflects a cool upper-air trough over southern Ontario, fostering northerly winds and reduced solar insolation that capped daytime heating well below the mid-May climatological average of 18°C. Model ensembles from NOAA and ECMWF had forecasted subdued highs of 10–12°C pre-event, with actual data validating the lowest outcome. While daily records are preliminary until final quality control, revisions rarely exceed 1°C for maximum temperatures, rendering challenges improbable absent equipment malfunction.
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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