The market's near-certain pricing on a 23°C high for Toronto on September 11 reflects the official recorded maximum aligning precisely with the 1991–2020 climatological average high for that date. Clear skies and light southerly flow under stable high pressure produced typical early-fall conditions without significant warm or cool advection, keeping temperatures near the long-term norm as confirmed by post-event observations. Environment Canada and regional station data established the peak without notable model divergence or measurement revisions. A shift in the market would require an official adjustment to the daily maximum or reclassification of station readings, both rare once preliminary reports are finalized.
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 11?
Highest temperature in Toronto on September 11?
23°C 100.0%
18°C or below <1%
19°C <1%
20°C <1%
$50,875 Vol.
$50,875 Vol.
Sep 11, 2026
18°C or below
<1%
19°C
<1%
20°C
<1%
21°C
<1%
22°C
<1%
23°C
100%
24°C
<1%
25°C
<1%
26°C
<1%
27°C
<1%
28°C or higher
<1%
23°C 100.0%
18°C or below <1%
19°C <1%
20°C <1%
$50,875 Vol.
$50,875 Vol.
Sep 11, 2026
18°C or below
$316 Vol.
<1%
19°C
$268 Vol.
<1%
20°C
$946 Vol.
<1%
21°C
$3,428 Vol.
<1%
22°C
$9,895 Vol.
<1%
23°C
$15,807 Vol.
100%
24°C
$9,518 Vol.
<1%
25°C
$4,939 Vol.
<1%
26°C
$2,908 Vol.
<1%
27°C
$1,368 Vol.
<1%
28°C or higher
$1,481 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 11 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 market's near-certain pricing on a 23°C high for Toronto on September 11 reflects the official recorded maximum aligning precisely with the 1991–2020 climatological average high for that date. Clear skies and light southerly flow under stable high pressure produced typical early-fall conditions without significant warm or cool advection, keeping temperatures near the long-term norm as confirmed by post-event observations. Environment Canada and regional station data established the peak without notable model divergence or measurement revisions. A shift in the market would require an official adjustment to the daily maximum or reclassification of station readings, both rare once preliminary reports are finalized.
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 11 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 9, 2026, 8:55 AM ET
Volume
$50,875End Date
Sep 11, 2026Market Opened
Sep 9, 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 11 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 market's near-certain pricing on a 23°C high for Toronto on September 11 reflects the official recorded maximum aligning precisely with the 1991–2020 climatological average high for that date. Clear skies and light southerly flow under stable high pressure produced typical early-fall conditions without significant warm or cool advection, keeping temperatures near the long-term norm as confirmed by post-event observations. Environment Canada and regional station data established the peak without notable model divergence or measurement revisions. A shift in the market would require an official adjustment to the daily maximum or reclassification of station readings, both rare once preliminary reports are finalized.
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 11 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
$50,875End Date
Sep 11, 2026Market Opened
Sep 9, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...The market's near-certain pricing on a 23°C high for Toronto on September 11 reflects the official recorded maximum aligning precisely with the 1991–2020 climatological average high for that date. Clear skies and light southerly flow under stable high pressure produced typical early-fall conditions without significant warm or cool advection, keeping temperatures near the long-term norm as confirmed by post-event observations. Environment Canada and regional station data established the peak without notable model divergence or measurement revisions. A shift in the market would require an official adjustment to the daily maximum or reclassification of station readings, both rare once preliminary reports are finalized.
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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