Persistent cloud cover and showers across the Toronto region have suppressed daytime heating on August 23, 2026, anchoring official Environment Canada and model guidance near a 19 °C maximum. Early-morning observations at Pearson Airport showed 17.4 °C under mostly cloudy skies with high humidity, limiting solar insolation and favoring modest convective cooling rather than further warming. This aligns with the market’s overwhelming 97.5 % implied probability for 19 °C, as traders integrate real-time surface data and short-range ensemble forecasts showing little potential for rapid temperature rise. A sudden clearing of stratiform clouds or an unexpected warm-air advection episode before peak heating could still push readings to 20–21 °C, though such shifts appear unlikely given the entrenched synoptic pattern.
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 August 23?
Highest temperature in Toronto on August 23?
19°C 95%
20°C 2%
21°C 2%
22°C 1.0%
$34,092 Vol.
$34,092 Vol.
Aug 23, 2026
15°C or below
<1%
16°C
<1%
17°C
<1%
18°C
<1%
19°C
95%
20°C
2%
21°C
2%
22°C
1%
23°C
<1%
24°C
<1%
25°C or higher
<1%
19°C 95%
20°C 2%
21°C 2%
22°C 1.0%
$34,092 Vol.
$34,092 Vol.
Aug 23, 2026
15°C or below
$776 Vol.
<1%
16°C
$2,165 Vol.
<1%
17°C
$701 Vol.
<1%
18°C
$5,441 Vol.
<1%
19°C
$5,608 Vol.
95%
20°C
$5,961 Vol.
2%
21°C
$3,609 Vol.
2%
22°C
$4,791 Vol.
1%
23°C
$2,635 Vol.
<1%
24°C
$1,697 Vol.
<1%
25°C or higher
$708 Vol.
<1%
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 23 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.Persistent cloud cover and showers across the Toronto region have suppressed daytime heating on August 23, 2026, anchoring official Environment Canada and model guidance near a 19 °C maximum. Early-morning observations at Pearson Airport showed 17.4 °C under mostly cloudy skies with high humidity, limiting solar insolation and favoring modest convective cooling rather than further warming. This aligns with the market’s overwhelming 97.5 % implied probability for 19 °C, as traders integrate real-time surface data and short-range ensemble forecasts showing little potential for rapid temperature rise. A sudden clearing of stratiform clouds or an unexpected warm-air advection episode before peak heating could still push readings to 20–21 °C, though such shifts appear unlikely given the entrenched synoptic pattern.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 23 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Market Opened: Aug 21, 2026, 11:56 PM ET
Volume
$34,092End Date
Aug 23, 2026Market Opened
Aug 21, 2026, 11:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 23 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.Persistent cloud cover and showers across the Toronto region have suppressed daytime heating on August 23, 2026, anchoring official Environment Canada and model guidance near a 19 °C maximum. Early-morning observations at Pearson Airport showed 17.4 °C under mostly cloudy skies with high humidity, limiting solar insolation and favoring modest convective cooling rather than further warming. This aligns with the market’s overwhelming 97.5 % implied probability for 19 °C, as traders integrate real-time surface data and short-range ensemble forecasts showing little potential for rapid temperature rise. A sudden clearing of stratiform clouds or an unexpected warm-air advection episode before peak heating could still push readings to 20–21 °C, though such shifts appear unlikely given the entrenched synoptic pattern.
This market will resolve to the temperature range that contains the highest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 23 Aug '26.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
The resolution source for this market will be information from NOAA, specifically the highest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=cyyz
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
Revisions to temperatures recorded within this market's timeframe will be considered until the first datapoint for the following date has been published, after which any alterations will not be considered.
Volume
$34,092End Date
Aug 23, 2026Market Opened
Aug 21, 2026, 11:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Persistent cloud cover and showers across the Toronto region have suppressed daytime heating on August 23, 2026, anchoring official Environment Canada and model guidance near a 19 °C maximum. Early-morning observations at Pearson Airport showed 17.4 °C under mostly cloudy skies with high humidity, limiting solar insolation and favoring modest convective cooling rather than further warming. This aligns with the market’s overwhelming 97.5 % implied probability for 19 °C, as traders integrate real-time surface data and short-range ensemble forecasts showing little potential for rapid temperature rise. A sudden clearing of stratiform clouds or an unexpected warm-air advection episode before peak heating could still push readings to 20–21 °C, though such shifts appear unlikely given the entrenched synoptic pattern.
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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