Official short-term forecasts from Environment Canada and supporting models project a high of 25°C for Toronto on August 21 under sunny conditions, with lows near 16°C, aligning with the market's leading 25°C (46.5%) and 26°C (31%) outcomes. Late-August climatology shows typical highs declining toward 24–25°C amid seasonal cooling, with no strong warm or cool advection expected in recent model runs. Isolated thunderstorm chances noted in broader monthly outlooks introduce minor uncertainty around exact maxima, but current guidance favors temperatures clustering in the mid-20s rather than extremes above 27°C or below 24°C. Traders appear to weight the consensus forecast heavily, with implied probabilities reflecting low likelihood of significant model shifts 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 21?
Highest temperature in Toronto on August 21?
25°C 58%
26°C 28%
24°C 12%
23°C 5%
NEW
NEW
Aug 21, 2026
21°C or below
1%
22°C
1%
23°C
5%
24°C
12%
25°C
58%
26°C
28%
27°C
5%
28°C
2%
29°C
<1%
30°C
<1%
31°C or higher
<1%
25°C 58%
26°C 28%
24°C 12%
23°C 5%
NEW
NEW
Aug 21, 2026
21°C or below
$0 Vol.
1%
22°C
$0 Vol.
1%
23°C
$0 Vol.
5%
24°C
$92 Vol.
12%
25°C
$85 Vol.
58%
26°C
$15 Vol.
28%
27°C
$0 Vol.
5%
28°C
$0 Vol.
2%
29°C
$5 Vol.
<1%
30°C
$5 Vol.
<1%
31°C or higher
$5 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 21 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.Official short-term forecasts from Environment Canada and supporting models project a high of 25°C for Toronto on August 21 under sunny conditions, with lows near 16°C, aligning with the market's leading 25°C (46.5%) and 26°C (31%) outcomes. Late-August climatology shows typical highs declining toward 24–25°C amid seasonal cooling, with no strong warm or cool advection expected in recent model runs. Isolated thunderstorm chances noted in broader monthly outlooks introduce minor uncertainty around exact maxima, but current guidance favors temperatures clustering in the mid-20s rather than extremes above 27°C or below 24°C. Traders appear to weight the consensus forecast heavily, with implied probabilities reflecting low likelihood of significant model shifts before 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 21 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 21 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 19, 2026, 9:56 PM ET
Volume
$207End Date
Aug 21, 2026Market Opened
Aug 19, 2026, 9:56 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 21 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.Official short-term forecasts from Environment Canada and supporting models project a high of 25°C for Toronto on August 21 under sunny conditions, with lows near 16°C, aligning with the market's leading 25°C (46.5%) and 26°C (31%) outcomes. Late-August climatology shows typical highs declining toward 24–25°C amid seasonal cooling, with no strong warm or cool advection expected in recent model runs. Isolated thunderstorm chances noted in broader monthly outlooks introduce minor uncertainty around exact maxima, but current guidance favors temperatures clustering in the mid-20s rather than extremes above 27°C or below 24°C. Traders appear to weight the consensus forecast heavily, with implied probabilities reflecting low likelihood of significant model shifts before 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 21 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 21 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
$207End Date
Aug 21, 2026Market Opened
Aug 19, 2026, 9:56 PM ETResolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Official short-term forecasts from Environment Canada and supporting models project a high of 25°C for Toronto on August 21 under sunny conditions, with lows near 16°C, aligning with the market's leading 25°C (46.5%) and 26°C (31%) outcomes. Late-August climatology shows typical highs declining toward 24–25°C amid seasonal cooling, with no strong warm or cool advection expected in recent model runs. Isolated thunderstorm chances noted in broader monthly outlooks introduce minor uncertainty around exact maxima, but current guidance favors temperatures clustering in the mid-20s rather than extremes above 27°C or below 24°C. Traders appear to weight the consensus forecast heavily, with implied probabilities reflecting low likelihood of significant model shifts 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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