Official Environment Canada observations at Toronto Pearson International Airport, the authoritative station for Toronto weather records, confirm the highest temperature on April 20, 2026, reached exactly 5°C around mid-afternoon, aligning with trader consensus at 100% implied probability. Persistent northwesterly winds of 20-30 km/h and mostly cloudy skies capped daytime heating after overnight lows near -2°C, consistent with pre-event forecasts from GFS and ECMWF models predicting highs struggling in the 3-5°C range amid a lingering cold front. This positioning reflects real-time data releases driving rapid market resolution. Realistic challenges would require a data revision uncovering a higher validated reading from quality-controlled observations, though such adjustments are rare post-preliminary reporting.
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 April 20?
Highest temperature in Toronto on April 20?
5°C 100.0%
1°C or below <1%
2°C <1%
3°C <1%
$116,321 Vol.
$116,321 Vol.
Apr 20, 2026
1°C or below
No
2°C
No
3°C
No
4°C
No
5°C
Yes
6°C
No
7°C
No
8°C
No
9°C
No
10°C
No
11°C or higher
No
5°C 100.0%
1°C or below <1%
2°C <1%
3°C <1%
$116,321 Vol.
$116,321 Vol.
Apr 20, 2026
1°C or below
$7,950 Vol.
No
2°C
$10,984 Vol.
No
3°C
$9,888 Vol.
No
4°C
$17,691 Vol.
No
5°C
$16,092 Vol.
Yes
6°C
$13,172 Vol.
No
7°C
$11,094 Vol.
No
8°C
$5,619 Vol.
No
9°C
$3,941 Vol.
No
10°C
$2,908 Vol.
No
11°C or higher
$16,982 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 20 Apr '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 Environment Canada observations at Toronto Pearson International Airport, the authoritative station for Toronto weather records, confirm the highest temperature on April 20, 2026, reached exactly 5°C around mid-afternoon, aligning with trader consensus at 100% implied probability. Persistent northwesterly winds of 20-30 km/h and mostly cloudy skies capped daytime heating after overnight lows near -2°C, consistent with pre-event forecasts from GFS and ECMWF models predicting highs struggling in the 3-5°C range amid a lingering cold front. This positioning reflects real-time data releases driving rapid market resolution. Realistic challenges would require a data revision uncovering a higher validated reading from quality-controlled observations, though such adjustments are rare post-preliminary reporting.
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 20 Apr '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: Apr 18, 2026, 12:28 AM ET
Volume
$116,321End Date
Apr 20, 2026Market Opened
Apr 18, 2026, 12:28 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 20 Apr '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 Environment Canada observations at Toronto Pearson International Airport, the authoritative station for Toronto weather records, confirm the highest temperature on April 20, 2026, reached exactly 5°C around mid-afternoon, aligning with trader consensus at 100% implied probability. Persistent northwesterly winds of 20-30 km/h and mostly cloudy skies capped daytime heating after overnight lows near -2°C, consistent with pre-event forecasts from GFS and ECMWF models predicting highs struggling in the 3-5°C range amid a lingering cold front. This positioning reflects real-time data releases driving rapid market resolution. Realistic challenges would require a data revision uncovering a higher validated reading from quality-controlled observations, though such adjustments are rare post-preliminary reporting.
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 20 Apr '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
$116,321End Date
Apr 20, 2026Market Opened
Apr 18, 2026, 12:28 AM ETResolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official Environment Canada observations at Toronto Pearson International Airport, the authoritative station for Toronto weather records, confirm the highest temperature on April 20, 2026, reached exactly 5°C around mid-afternoon, aligning with trader consensus at 100% implied probability. Persistent northwesterly winds of 20-30 km/h and mostly cloudy skies capped daytime heating after overnight lows near -2°C, consistent with pre-event forecasts from GFS and ECMWF models predicting highs struggling in the 3-5°C range amid a lingering cold front. This positioning reflects real-time data releases driving rapid market resolution. Realistic challenges would require a data revision uncovering a higher validated reading from quality-controlled observations, though such adjustments are rare post-preliminary reporting.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions