Recent forecasts from GFS and other models indicate a high near 23–26°C for Toronto on September 12, driven by building high pressure and southerly flow after midweek rain, with partly cloudy skies and light southeast winds limiting full solar heating. This setup supports the market’s tight clustering around 25°C (38%) and 26°C (31.5%), as afternoon cloud cover and possible light showers introduce modest uncertainty in peak insolation and boundary-layer mixing. Historical September 12 averages near 23°C provide context, while model spread in timing of any showers or clearing keeps lower and higher outcomes viable but less favored. Resolution hinges on official Environment Canada observations of the daily maximum.
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 September 12?
Highest temperature in Toronto on September 12?
25°C 38%
26°C 32%
24°C 13%
27°C 12%
NEW
NEW
Sep 12, 2026
21°C or below
1%
22°C
2%
23°C
2%
24°C
13%
25°C
38%
26°C
32%
27°C
12%
28°C
4%
29°C
2%
30°C
1%
31°C or higher
1%
25°C 38%
26°C 32%
24°C 13%
27°C 12%
NEW
NEW
Sep 12, 2026
21°C or below
$210 Vol.
1%
22°C
$106 Vol.
2%
23°C
$275 Vol.
2%
24°C
$904 Vol.
13%
25°C
$857 Vol.
38%
26°C
$697 Vol.
32%
27°C
$276 Vol.
12%
28°C
$156 Vol.
4%
29°C
$54 Vol.
2%
30°C
$100 Vol.
1%
31°C or higher
$150 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 12 Sep '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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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 GFS and other models indicate a high near 23–26°C for Toronto on September 12, driven by building high pressure and southerly flow after midweek rain, with partly cloudy skies and light southeast winds limiting full solar heating. This setup supports the market’s tight clustering around 25°C (38%) and 26°C (31.5%), as afternoon cloud cover and possible light showers introduce modest uncertainty in peak insolation and boundary-layer mixing. Historical September 12 averages near 23°C provide context, while model spread in timing of any showers or clearing keeps lower and higher outcomes viable but less favored. Resolution hinges on official Environment Canada observations of the daily maximum.
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 12 Sep '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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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: Sep 10, 2026, 8:56 AM ET
Volume
$3,749End Date
Sep 12, 2026Market Opened
Sep 10, 2026, 8:56 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 12 Sep '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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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 GFS and other models indicate a high near 23–26°C for Toronto on September 12, driven by building high pressure and southerly flow after midweek rain, with partly cloudy skies and light southeast winds limiting full solar heating. This setup supports the market’s tight clustering around 25°C (38%) and 26°C (31.5%), as afternoon cloud cover and possible light showers introduce modest uncertainty in peak insolation and boundary-layer mixing. Historical September 12 averages near 23°C provide context, while model spread in timing of any showers or clearing keeps lower and higher outcomes viable but less favored. Resolution hinges on official Environment Canada observations of the daily maximum.
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 12 Sep '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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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.
In the event that there is no data for the observation date by 11:59 PM ET on the day following the observation date, this market will resolve to the lowest bracket.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market will resolve once the first data point for the following date has been published on the resolution source, or by 11:59 PM ET on the day following the observation date, whichever comes first.
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
$3,749End Date
Sep 12, 2026Market Opened
Sep 10, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Recent forecasts from GFS and other models indicate a high near 23–26°C for Toronto on September 12, driven by building high pressure and southerly flow after midweek rain, with partly cloudy skies and light southeast winds limiting full solar heating. This setup supports the market’s tight clustering around 25°C (38%) and 26°C (31.5%), as afternoon cloud cover and possible light showers introduce modest uncertainty in peak insolation and boundary-layer mixing. Historical September 12 averages near 23°C provide context, while model spread in timing of any showers or clearing keeps lower and higher outcomes viable but less favored. Resolution hinges on official Environment Canada observations of the daily maximum.
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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