Meteorological forecasts from Environment Canada and supporting global models show a maximum temperature of 17°C for Toronto on September 22 under persistent high pressure and northerly flow advecting cooler air. Ensemble consensus across multiple runs places the daily high squarely at this level, consistent with observed surface conditions and September climatology adjusted for the current pattern. Official hourly readings from Pearson International Airport will determine resolution, with the market reflecting high confidence in the forecast envelope. Minor shifts could occur from stronger daytime mixing or localized clearing that allows brief additional warming, though current guidance assigns low probability to outcomes outside the narrow 16–18°C band.
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 22?
Highest temperature in Toronto on September 22?
17°C 99.6%
11°C or below <1%
12°C <1%
13°C <1%
$39,939 Vol.
$39,939 Vol.
Sep 22, 2026
11°C or below
<1%
12°C
<1%
13°C
<1%
14°C
<1%
15°C
<1%
16°C
<1%
17°C
100%
18°C
<1%
19°C
<1%
20°C
<1%
21°C or higher
<1%
17°C 99.6%
11°C or below <1%
12°C <1%
13°C <1%
$39,939 Vol.
$39,939 Vol.
Sep 22, 2026
11°C or below
$8,168 Vol.
<1%
12°C
$135 Vol.
<1%
13°C
$160 Vol.
<1%
14°C
$267 Vol.
<1%
15°C
$4,066 Vol.
<1%
16°C
$6,580 Vol.
<1%
17°C
$8,813 Vol.
100%
18°C
$5,806 Vol.
<1%
19°C
$4,793 Vol.
<1%
20°C
$842 Vol.
<1%
21°C or higher
$309 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 22 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.Meteorological forecasts from Environment Canada and supporting global models show a maximum temperature of 17°C for Toronto on September 22 under persistent high pressure and northerly flow advecting cooler air. Ensemble consensus across multiple runs places the daily high squarely at this level, consistent with observed surface conditions and September climatology adjusted for the current pattern. Official hourly readings from Pearson International Airport will determine resolution, with the market reflecting high confidence in the forecast envelope. Minor shifts could occur from stronger daytime mixing or localized clearing that allows brief additional warming, though current guidance assigns low probability to outcomes outside the narrow 16–18°C band.
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 22 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 20, 2026, 8:55 AM ET
Volume
$39,939End Date
Sep 22, 2026Market Opened
Sep 20, 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 22 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.Meteorological forecasts from Environment Canada and supporting global models show a maximum temperature of 17°C for Toronto on September 22 under persistent high pressure and northerly flow advecting cooler air. Ensemble consensus across multiple runs places the daily high squarely at this level, consistent with observed surface conditions and September climatology adjusted for the current pattern. Official hourly readings from Pearson International Airport will determine resolution, with the market reflecting high confidence in the forecast envelope. Minor shifts could occur from stronger daytime mixing or localized clearing that allows brief additional warming, though current guidance assigns low probability to outcomes outside the narrow 16–18°C band.
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 22 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
$39,939End Date
Sep 22, 2026Market Opened
Sep 20, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Meteorological forecasts from Environment Canada and supporting global models show a maximum temperature of 17°C for Toronto on September 22 under persistent high pressure and northerly flow advecting cooler air. Ensemble consensus across multiple runs places the daily high squarely at this level, consistent with observed surface conditions and September climatology adjusted for the current pattern. Official hourly readings from Pearson International Airport will determine resolution, with the market reflecting high confidence in the forecast envelope. Minor shifts could occur from stronger daytime mixing or localized clearing that allows brief additional warming, though current guidance assigns low probability to outcomes outside the narrow 16–18°C band.
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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