**Trader sentiment for Toronto's August 20, 2026, daily high temperature centers on the 23–28°C range, with 25°C holding the clearest lead at 49.5% implied probability.** This positioning stems from the latest official forecasts, including Environment Canada guidance showing a mix of sun and cloud with a 40% chance of showers and a projected high of 25°C. Regional models and climatological baselines for late August in southern Ontario align closely with this value, reflecting typical seasonal conditions without strong high-pressure ridging or cold-air advection that would push extremes. Recent model consensus indicates stable steering patterns and moderate humidity levels that limit significant daytime heating or cooling, keeping probabilities for 29°C+ or sub-23°C outcomes low. Upcoming short-range forecast updates from agencies like the National Weather Service and Environment Canada will provide the next key data points for any adjustments ahead of 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 20?
Highest temperature in Toronto on August 20?
26°C 52%
25°C 34%
27°C 12%
24°C 10%
NEW
NEW
Aug 20, 2026
21°C or below
1%
22°C
1%
23°C
7%
24°C
10%
25°C
34%
26°C
39%
27°C
12%
28°C
7%
29°C
<1%
30°C
<1%
31°C or higher
<1%
26°C 52%
25°C 34%
27°C 12%
24°C 10%
NEW
NEW
Aug 20, 2026
21°C or below
$0 Vol.
1%
22°C
$0 Vol.
1%
23°C
$0 Vol.
7%
24°C
$0 Vol.
10%
25°C
$9 Vol.
34%
26°C
$161 Vol.
39%
27°C
$0 Vol.
12%
28°C
$6 Vol.
7%
29°C
$5 Vol.
<1%
30°C
$0 Vol.
<1%
31°C or higher
$0 Vol.
<1%
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, 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 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.**Trader sentiment for Toronto's August 20, 2026, daily high temperature centers on the 23–28°C range, with 25°C holding the clearest lead at 49.5% implied probability.**
This positioning stems from the latest official forecasts, including Environment Canada guidance showing a mix of sun and cloud with a 40% chance of showers and a projected high of 25°C. Regional models and climatological baselines for late August in southern Ontario align closely with this value, reflecting typical seasonal conditions without strong high-pressure ridging or cold-air advection that would push extremes.
Recent model consensus indicates stable steering patterns and moderate humidity levels that limit significant daytime heating or cooling, keeping probabilities for 29°C+ or sub-23°C outcomes low. Upcoming short-range forecast updates from agencies like the National Weather Service and Environment Canada will provide the next key data points for any adjustments ahead of resolution.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, 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 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.
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 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, 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 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 18, 2026, 9:55 PM ET
Volume
$181End Date
Aug 20, 2026Market Opened
Aug 18, 2026, 9:55 PM ETResolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, 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 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.**Trader sentiment for Toronto's August 20, 2026, daily high temperature centers on the 23–28°C range, with 25°C holding the clearest lead at 49.5% implied probability.**
This positioning stems from the latest official forecasts, including Environment Canada guidance showing a mix of sun and cloud with a 40% chance of showers and a projected high of 25°C. Regional models and climatological baselines for late August in southern Ontario align closely with this value, reflecting typical seasonal conditions without strong high-pressure ridging or cold-air advection that would push extremes.
Recent model consensus indicates stable steering patterns and moderate humidity levels that limit significant daytime heating or cooling, keeping probabilities for 29°C+ or sub-23°C outcomes low. Upcoming short-range forecast updates from agencies like the National Weather Service and Environment Canada will provide the next key data points for any adjustments ahead of resolution.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
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 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, 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 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.
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 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Toronto Pearson Intl Airport Station, 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 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
$181End Date
Aug 20, 2026Market Opened
Aug 18, 2026, 9:55 PM ETResolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...**Trader sentiment for Toronto's August 20, 2026, daily high temperature centers on the 23–28°C range, with 25°C holding the clearest lead at 49.5% implied probability.** This positioning stems from the latest official forecasts, including Environment Canada guidance showing a mix of sun and cloud with a 40% chance of showers and a projected high of 25°C. Regional models and climatological baselines for late August in southern Ontario align closely with this value, reflecting typical seasonal conditions without strong high-pressure ridging or cold-air advection that would push extremes. Recent model consensus indicates stable steering patterns and moderate humidity levels that limit significant daytime heating or cooling, keeping probabilities for 29°C+ or sub-23°C outcomes low. Upcoming short-range forecast updates from agencies like the National Weather Service and Environment Canada will provide the next key data points for any adjustments ahead of 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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