Recent forecasts from Environment Canada and other models indicate a high near 24°C for Toronto on August 31 amid widespread cloud cover, showers, and thunderstorm risk, driven by moist southeasterly flow and high humidity near 90-97%. Persistent overcast skies and precipitation suppress maximum temperatures by limiting solar heating and enhancing evaporative cooling, creating the narrow spread between 22°C and 24°C outcomes. Historical late-August averages near 24.6°C provide context, but the current unsettled pattern favors the lower end of the range. Updated model runs and morning observations will refine the exact peak before market 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 31?
Highest temperature in Toronto on August 31?
23°C 35%
22°C 30%
24°C 17%
21°C 14%
NEW
NEW
Aug 31, 2026
17°C or below
<1%
18°C
<1%
19°C
2%
20°C
4%
21°C
14%
22°C
30%
23°C
35%
24°C
17%
25°C
4%
26°C
1%
27°C or higher
<1%
23°C 35%
22°C 30%
24°C 17%
21°C 14%
NEW
NEW
Aug 31, 2026
17°C or below
$278 Vol.
<1%
18°C
$228 Vol.
<1%
19°C
$108 Vol.
2%
20°C
$7 Vol.
4%
21°C
$614 Vol.
14%
22°C
$335 Vol.
30%
23°C
$694 Vol.
35%
24°C
$622 Vol.
17%
25°C
$195 Vol.
4%
26°C
$136 Vol.
1%
27°C or higher
$281 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 31 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 for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the 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.Recent forecasts from Environment Canada and other models indicate a high near 24°C for Toronto on August 31 amid widespread cloud cover, showers, and thunderstorm risk, driven by moist southeasterly flow and high humidity near 90-97%. Persistent overcast skies and precipitation suppress maximum temperatures by limiting solar heating and enhancing evaporative cooling, creating the narrow spread between 22°C and 24°C outcomes. Historical late-August averages near 24.6°C provide context, but the current unsettled pattern favors the lower end of the range. Updated model runs and morning observations will refine the exact peak before market 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 31 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 for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the 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 for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the 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 29, 2026, 8:55 AM ET
Volume
$3,499End Date
Aug 31, 2026Market Opened
Aug 29, 2026, 8:55 AM 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 31 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 for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the 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.Recent forecasts from Environment Canada and other models indicate a high near 24°C for Toronto on August 31 amid widespread cloud cover, showers, and thunderstorm risk, driven by moist southeasterly flow and high humidity near 90-97%. Persistent overcast skies and precipitation suppress maximum temperatures by limiting solar heating and enhancing evaporative cooling, creating the narrow spread between 22°C and 24°C outcomes. Historical late-August averages near 24.6°C provide context, but the current unsettled pattern favors the lower end of the range. Updated model runs and morning observations will refine the exact peak before market 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 31 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 for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the 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 for the observation date is unavailable by 11:59 PM ET on the day following the observation date, the Weather Underground Daily Observations table will be used as the 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
$3,499End Date
Aug 31, 2026Market Opened
Aug 29, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Recent forecasts from Environment Canada and other models indicate a high near 24°C for Toronto on August 31 amid widespread cloud cover, showers, and thunderstorm risk, driven by moist southeasterly flow and high humidity near 90-97%. Persistent overcast skies and precipitation suppress maximum temperatures by limiting solar heating and enhancing evaporative cooling, creating the narrow spread between 22°C and 24°C outcomes. Historical late-August averages near 24.6°C provide context, but the current unsettled pattern favors the lower end of the range. Updated model runs and morning observations will refine the exact peak before market resolution.
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