Official forecasts from Environment Canada and supporting model consensus project a high of 26 °C for Toronto on August 27, driven by southwesterly flow ahead of a weak frontal system, with afternoon mixing under partly cloudy skies and a 40 % chance of showers that could cap peak heating. Recent GFS and regional runs show afternoon readings clustering between 24–26 °C, with modest spread arising from the precise timing and coverage of any convective cells and the strength of onshore lake-breeze moderation. This places the market-implied probabilities for 25 °C and 26 °C nearly even, as traders weigh the narrow window between full insolation and brief cloud or shower suppression against late-August climatological norms near 25 °C. Updated model guidance and official afternoon observations will determine the final maximum before resolution.
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 27?
Highest temperature in Toronto on August 27?
26°C 35%
25°C 34%
27°C 21%
23°C 9%
NEW
NEW
Aug 27, 2026
21°C or below
2%
22°C
3%
23°C
9%
24°C
8%
25°C
34%
26°C
35%
27°C
21%
28°C
5%
29°C
9%
30°C
1%
31°C or higher
3%
26°C 35%
25°C 34%
27°C 21%
23°C 9%
NEW
NEW
Aug 27, 2026
21°C or below
$11 Vol.
2%
22°C
$0 Vol.
3%
23°C
$0 Vol.
9%
24°C
$1 Vol.
8%
25°C
$2 Vol.
34%
26°C
$15 Vol.
35%
27°C
$0 Vol.
21%
28°C
$0 Vol.
5%
29°C
$26 Vol.
9%
30°C
$0 Vol.
1%
31°C or higher
$5 Vol.
3%
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 27 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
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
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.Official forecasts from Environment Canada and supporting model consensus project a high of 26 °C for Toronto on August 27, driven by southwesterly flow ahead of a weak frontal system, with afternoon mixing under partly cloudy skies and a 40 % chance of showers that could cap peak heating. Recent GFS and regional runs show afternoon readings clustering between 24–26 °C, with modest spread arising from the precise timing and coverage of any convective cells and the strength of onshore lake-breeze moderation. This places the market-implied probabilities for 25 °C and 26 °C nearly even, as traders weigh the narrow window between full insolation and brief cloud or shower suppression against late-August climatological norms near 25 °C. Updated model guidance and official afternoon observations will determine the final maximum before resolution.
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 27 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
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
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
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
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 25, 2026, 8:56 PM ET
Volume
$60End Date
Aug 27, 2026Market Opened
Aug 25, 2026, 8:56 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 27 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
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
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.Official forecasts from Environment Canada and supporting model consensus project a high of 26 °C for Toronto on August 27, driven by southwesterly flow ahead of a weak frontal system, with afternoon mixing under partly cloudy skies and a 40 % chance of showers that could cap peak heating. Recent GFS and regional runs show afternoon readings clustering between 24–26 °C, with modest spread arising from the precise timing and coverage of any convective cells and the strength of onshore lake-breeze moderation. This places the market-implied probabilities for 25 °C and 26 °C nearly even, as traders weigh the narrow window between full insolation and brief cloud or shower suppression against late-August climatological norms near 25 °C. Updated model guidance and official afternoon observations will determine the final maximum before resolution.
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 27 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
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
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
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
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
$60End Date
Aug 27, 2026Market Opened
Aug 25, 2026, 8:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Official forecasts from Environment Canada and supporting model consensus project a high of 26 °C for Toronto on August 27, driven by southwesterly flow ahead of a weak frontal system, with afternoon mixing under partly cloudy skies and a 40 % chance of showers that could cap peak heating. Recent GFS and regional runs show afternoon readings clustering between 24–26 °C, with modest spread arising from the precise timing and coverage of any convective cells and the strength of onshore lake-breeze moderation. This places the market-implied probabilities for 25 °C and 26 °C nearly even, as traders weigh the narrow window between full insolation and brief cloud or shower suppression against late-August climatological norms near 25 °C. Updated model guidance and official afternoon observations will determine the final maximum before resolution.
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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