Official observations from Environment and Climate Change Canada at Toronto Pearson International Airport, the authoritative station for such metrics, confirm the highest temperature on May 12, 2026, reached 12°C at 14:00 EDT, driving the market's 100% consensus on this outcome. Hourly data reveals a gradual daytime rise from overnight lows of 2–3°C under mostly cloudy skies with light northerly to southeasterly winds up to 15 km/h and no precipitation, peaking amid brief sunny intervals before cooling to 7–9°C by evening. This cool anomaly below mid-May climatological norms of 18–20°C aligns with a recent frontal boundary suppressing warmth. Post-resolution revisions to preliminary data are exceedingly rare, requiring verified instrument errors, leaving negligible room for challenge.
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 12?
Highest temperature in Toronto on May 12?
12°C 100.0%
9°C or below <1%
10°C <1%
11°C <1%
$57,913 Vol.
$57,913 Vol.
May 12, 2026
9°C or below
No
10°C
No
11°C
No
12°C
Yes
13°C
No
14°C
No
15°C
No
16°C
No
17°C
No
18°C
No
19°C or higher
No
12°C 100.0%
9°C or below <1%
10°C <1%
11°C <1%
$57,913 Vol.
$57,913 Vol.
May 12, 2026
9°C or below
$5,247 Vol.
No
10°C
$6,984 Vol.
No
11°C
$4,132 Vol.
No
12°C
$9,426 Vol.
Yes
13°C
$7,295 Vol.
No
14°C
$4,424 Vol.
No
15°C
$5,376 Vol.
No
16°C
$4,157 Vol.
No
17°C
$4,459 Vol.
No
18°C
$3,363 Vol.
No
19°C or higher
$3,050 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 12 May '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 observations from Environment and Climate Change Canada at Toronto Pearson International Airport, the authoritative station for such metrics, confirm the highest temperature on May 12, 2026, reached 12°C at 14:00 EDT, driving the market's 100% consensus on this outcome. Hourly data reveals a gradual daytime rise from overnight lows of 2–3°C under mostly cloudy skies with light northerly to southeasterly winds up to 15 km/h and no precipitation, peaking amid brief sunny intervals before cooling to 7–9°C by evening. This cool anomaly below mid-May climatological norms of 18–20°C aligns with a recent frontal boundary suppressing warmth. Post-resolution revisions to preliminary data are exceedingly rare, requiring verified instrument errors, leaving negligible room for challenge.
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 12 May '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: May 10, 2026, 12:13 AM ET
Volume
$57,913End Date
May 12, 2026Market Opened
May 10, 2026, 12:13 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 12 May '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 observations from Environment and Climate Change Canada at Toronto Pearson International Airport, the authoritative station for such metrics, confirm the highest temperature on May 12, 2026, reached 12°C at 14:00 EDT, driving the market's 100% consensus on this outcome. Hourly data reveals a gradual daytime rise from overnight lows of 2–3°C under mostly cloudy skies with light northerly to southeasterly winds up to 15 km/h and no precipitation, peaking amid brief sunny intervals before cooling to 7–9°C by evening. This cool anomaly below mid-May climatological norms of 18–20°C aligns with a recent frontal boundary suppressing warmth. Post-resolution revisions to preliminary data are exceedingly rare, requiring verified instrument errors, leaving negligible room for challenge.
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 12 May '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
$57,913End Date
May 12, 2026Market Opened
May 10, 2026, 12:13 AM ETResolution 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, the authoritative station for such metrics, confirm the highest temperature on May 12, 2026, reached 12°C at 14:00 EDT, driving the market's 100% consensus on this outcome. Hourly data reveals a gradual daytime rise from overnight lows of 2–3°C under mostly cloudy skies with light northerly to southeasterly winds up to 15 km/h and no precipitation, peaking amid brief sunny intervals before cooling to 7–9°C by evening. This cool anomaly below mid-May climatological norms of 18–20°C aligns with a recent frontal boundary suppressing warmth. Post-resolution revisions to preliminary data are exceedingly rare, requiring verified instrument errors, leaving negligible room for challenge.
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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