Environment Canada's official meteorological observations from Toronto Pearson International Airport confirm the highest temperature on April 4 reached exactly 7°C, driving trader consensus to 100% implied probability amid real-money positions. Persistent cloud cover, gusty easterly winds up to 28 km/h, and scattered showers under rainfall warnings suppressed daytime heating, aligning with early-spring climatological norms where April 4 averages around 8–10°C but variability is common due to Lake Ontario influences. Model forecasts had anticipated cool conditions, and hourly data shows no exceedance. Realistic challenges would require post-validation data revisions from auxiliary stations or quality-control adjustments—rare events typically resolved within 24–48 hours by Environment and Climate Change Canada.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Toronto on April 4?
Highest temperature in Toronto on April 4?
7°C 100.0%
1°C or below <1%
2°C <1%
3°C <1%
$175,226 Vol.
$175,226 Vol.
1°C or below
No
2°C
No
3°C
No
4°C
No
5°C
No
6°C
No
7°C
Yes
8°C
No
9°C
No
10°C
No
11°C or higher
No
7°C 100.0%
1°C or below <1%
2°C <1%
3°C <1%
$175,226 Vol.
$175,226 Vol.
1°C or below
No
2°C
No
3°C
No
4°C
No
5°C
No
6°C
No
7°C
Yes
8°C
No
9°C
No
10°C
No
11°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: Mar 29, 2026, 5:26 PM 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
Environment Canada's official meteorological observations from Toronto Pearson International Airport confirm the highest temperature on April 4 reached exactly 7°C, driving trader consensus to 100% implied probability amid real-money positions. Persistent cloud cover, gusty easterly winds up to 28 km/h, and scattered showers under rainfall warnings suppressed daytime heating, aligning with early-spring climatological norms where April 4 averages around 8–10°C but variability is common due to Lake Ontario influences. Model forecasts had anticipated cool conditions, and hourly data shows no exceedance. Realistic challenges would require post-validation data revisions from auxiliary stations or quality-control adjustments—rare events typically resolved within 24–48 hours by Environment and Climate Change Canada.
Experimental AI-generated summary referencing Polymarket data · Updated
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