Environment Canada's latest forecast for Toronto on April 5 calls for a high near 6-7°C under cloudy skies with 30-40% chance of showers, driven by a persistent upper-level trough over eastern North America maintaining cool temperatures ahead of an approaching frontal system. Yet trader consensus favors milder outcomes around 8-12°C (implied probabilities 15-24%), reflecting spread among global models—GEM leaning cooler per Canadian Meteorological Centre guidance, while GFS and ECMWF ensembles show potential for weak ridging and warmer advection. Early April climatology averages 9.5°C highs, moderated by Lake Ontario, amplifying uncertainty; watch 12Z model updates Friday for shifts ahead of resolution at Toronto Pearson or Buttonville observatories.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Toronto on April 5?
Highest temperature in Toronto on April 5?
12°C or higher 19%
9°C 18%
8°C 16%
10°C 15%
$10,822 Vol.
$10,822 Vol.
2°C or below
<1%
3°C
<1%
4°C
1%
5°C
1%
6°C
5%
7°C
10%
8°C
16%
9°C
18%
10°C
15%
11°C
13%
12°C or higher
19%
12°C or higher 19%
9°C 18%
8°C 16%
10°C 15%
$10,822 Vol.
$10,822 Vol.
2°C or below
<1%
3°C
<1%
4°C
1%
5°C
1%
6°C
5%
7°C
10%
8°C
16%
9°C
18%
10°C
15%
11°C
13%
12°C or higher
19%
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 1, 2026, 6:01 AM ET
Resolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...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...Environment Canada's latest forecast for Toronto on April 5 calls for a high near 6-7°C under cloudy skies with 30-40% chance of showers, driven by a persistent upper-level trough over eastern North America maintaining cool temperatures ahead of an approaching frontal system. Yet trader consensus favors milder outcomes around 8-12°C (implied probabilities 15-24%), reflecting spread among global models—GEM leaning cooler per Canadian Meteorological Centre guidance, while GFS and ECMWF ensembles show potential for weak ridging and warmer advection. Early April climatology averages 9.5°C highs, moderated by Lake Ontario, amplifying uncertainty; watch 12Z model updates Friday for shifts ahead of resolution at Toronto Pearson or Buttonville observatories.
Experimental AI-generated summary referencing Polymarket data · Updated
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