Current forecasts from Environment Canada and other models indicate a high near 22–26 °C on August 31, close to the long-term average of 24.6 °C, amid mostly cloudy skies, easterly winds, and a 40–60 % chance of showers that limit daytime heating through reduced insolation and evaporative cooling. This balance between modest warmth from late-summer southerly flow and suppression from cloud and precipitation explains the near-even split between sub-18 °C and 27 °C-plus outcomes, with mid-range probabilities reflecting model spread on rainfall timing and intensity. Updated runs from the National Weather Service and Canadian Meteorological Centre over the next 48 hours will likely resolve the key variables of cloud thickness and boundary-layer moisture.
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?
17°C or below 46%
27°C or higher 46%
23°C 29%
22°C 25%
NEW
NEW
Aug 31, 2026
17°C or below
46%
18°C
<1%
19°C
7%
20°C
10%
21°C
24%
22°C
25%
23°C
29%
24°C
23%
25°C
6%
26°C
12%
27°C or higher
46%
17°C or below 46%
27°C or higher 46%
23°C 29%
22°C 25%
NEW
NEW
Aug 31, 2026
17°C or below
$0 Vol.
46%
18°C
$0 Vol.
<1%
19°C
$0 Vol.
7%
20°C
$0 Vol.
10%
21°C
$0 Vol.
24%
22°C
$0 Vol.
25%
23°C
$0 Vol.
29%
24°C
$0 Vol.
23%
25°C
$18 Vol.
6%
26°C
$0 Vol.
12%
27°C or higher
$0 Vol.
46%
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.Current forecasts from Environment Canada and other models indicate a high near 22–26 °C on August 31, close to the long-term average of 24.6 °C, amid mostly cloudy skies, easterly winds, and a 40–60 % chance of showers that limit daytime heating through reduced insolation and evaporative cooling. This balance between modest warmth from late-summer southerly flow and suppression from cloud and precipitation explains the near-even split between sub-18 °C and 27 °C-plus outcomes, with mid-range probabilities reflecting model spread on rainfall timing and intensity. Updated runs from the National Weather Service and Canadian Meteorological Centre over the next 48 hours will likely resolve the key variables of cloud thickness and boundary-layer moisture.
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
$18End 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.Current forecasts from Environment Canada and other models indicate a high near 22–26 °C on August 31, close to the long-term average of 24.6 °C, amid mostly cloudy skies, easterly winds, and a 40–60 % chance of showers that limit daytime heating through reduced insolation and evaporative cooling. This balance between modest warmth from late-summer southerly flow and suppression from cloud and precipitation explains the near-even split between sub-18 °C and 27 °C-plus outcomes, with mid-range probabilities reflecting model spread on rainfall timing and intensity. Updated runs from the National Weather Service and Canadian Meteorological Centre over the next 48 hours will likely resolve the key variables of cloud thickness and boundary-layer moisture.
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
$18End Date
Aug 31, 2026Market Opened
Aug 29, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Current forecasts from Environment Canada and other models indicate a high near 22–26 °C on August 31, close to the long-term average of 24.6 °C, amid mostly cloudy skies, easterly winds, and a 40–60 % chance of showers that limit daytime heating through reduced insolation and evaporative cooling. This balance between modest warmth from late-summer southerly flow and suppression from cloud and precipitation explains the near-even split between sub-18 °C and 27 °C-plus outcomes, with mid-range probabilities reflecting model spread on rainfall timing and intensity. Updated runs from the National Weather Service and Canadian Meteorological Centre over the next 48 hours will likely resolve the key variables of cloud thickness and boundary-layer moisture.
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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