Current forecasts from Environment Canada and supporting models position a high of 28–29°C as the most probable outcome for Toronto on August 9, aligning with the market's leading implied probabilities. Sunny conditions and modest southerly flow under building high pressure support daytime warming from overnight lows near 18–20°C, while limited moisture and weak steering patterns reduce the risk of significant cloud cover or showers that could cap temperatures. Recent model runs show tight clustering around this range, with typical forecast uncertainty of ±1–2°C reflecting minor variations in afternoon mixing and boundary-layer development. Historical August highs average near 26–27°C, making the current setup slightly above normal but consistent with the stable late-summer pattern. Updated guidance from official agencies later today could refine probabilities 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 9?
Highest temperature in Toronto on August 9?
28°C 42%
27°C 25%
29°C 23%
26°C 5%
NEW
NEW
Aug 9, 2026
23°C or below
<1%
24°C
1%
25°C
2%
26°C
5%
27°C
25%
28°C
42%
29°C
23%
30°C
5%
31°C
1%
32°C
1%
33°C or higher
1%
28°C 42%
27°C 25%
29°C 23%
26°C 5%
NEW
NEW
Aug 9, 2026
23°C or below
$60 Vol.
<1%
24°C
$45 Vol.
1%
25°C
$41 Vol.
2%
26°C
$182 Vol.
5%
27°C
$517 Vol.
25%
28°C
$109 Vol.
42%
29°C
$88 Vol.
23%
30°C
$45 Vol.
5%
31°C
$73 Vol.
1%
32°C
$64 Vol.
1%
33°C or higher
$161 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 9 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.Current forecasts from Environment Canada and supporting models position a high of 28–29°C as the most probable outcome for Toronto on August 9, aligning with the market's leading implied probabilities. Sunny conditions and modest southerly flow under building high pressure support daytime warming from overnight lows near 18–20°C, while limited moisture and weak steering patterns reduce the risk of significant cloud cover or showers that could cap temperatures. Recent model runs show tight clustering around this range, with typical forecast uncertainty of ±1–2°C reflecting minor variations in afternoon mixing and boundary-layer development. Historical August highs average near 26–27°C, making the current setup slightly above normal but consistent with the stable late-summer pattern. Updated guidance from official agencies later today could refine probabilities 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 9 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 9 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 7, 2026, 9:02 PM ET
Volume
$1,387End Date
Aug 9, 2026Market Opened
Aug 7, 2026, 9:02 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 9 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.Current forecasts from Environment Canada and supporting models position a high of 28–29°C as the most probable outcome for Toronto on August 9, aligning with the market's leading implied probabilities. Sunny conditions and modest southerly flow under building high pressure support daytime warming from overnight lows near 18–20°C, while limited moisture and weak steering patterns reduce the risk of significant cloud cover or showers that could cap temperatures. Recent model runs show tight clustering around this range, with typical forecast uncertainty of ±1–2°C reflecting minor variations in afternoon mixing and boundary-layer development. Historical August highs average near 26–27°C, making the current setup slightly above normal but consistent with the stable late-summer pattern. Updated guidance from official agencies later today could refine probabilities 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 9 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 9 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
$1,387End Date
Aug 9, 2026Market Opened
Aug 7, 2026, 9:02 PM ETResolution Source
https://www.wunderground.com/history/daily/ca/mississauga/CYYZResolver
0x69c47De9D...Current forecasts from Environment Canada and supporting models position a high of 28–29°C as the most probable outcome for Toronto on August 9, aligning with the market's leading implied probabilities. Sunny conditions and modest southerly flow under building high pressure support daytime warming from overnight lows near 18–20°C, while limited moisture and weak steering patterns reduce the risk of significant cloud cover or showers that could cap temperatures. Recent model runs show tight clustering around this range, with typical forecast uncertainty of ±1–2°C reflecting minor variations in afternoon mixing and boundary-layer development. Historical August highs average near 26–27°C, making the current setup slightly above normal but consistent with the stable late-summer pattern. Updated guidance from official agencies later today could refine probabilities 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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