Official meteorological observations from Environment and Climate Change Canada recorded a daily maximum of 24°C in Toronto on September 9, 2026, aligning precisely with the market's 100% implied probability for that outcome. Pre-event forecasts from multiple models anticipated highs near 23–26°C amid cloudy conditions and a southwest flow, with limited convective activity keeping temperatures from exceeding the observed peak. This consensus reflects the strong convergence between numerical weather prediction outputs, historical September averages around 23°C, and post-event verification data. Only a significant revision in station readings or a shift to an alternate measurement site could alter resolution, though such adjustments remain improbable given standardized protocols.
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 9?
Highest temperature in Toronto on September 9?
24°C 100.0%
19°C or below <1%
20°C <1%
21°C <1%
$58,720 Vol.
$58,720 Vol.
Sep 9, 2026
19°C or below
<1%
20°C
<1%
21°C
<1%
22°C
<1%
23°C
<1%
24°C
100%
25°C
<1%
26°C
<1%
27°C
<1%
28°C
<1%
29°C or higher
<1%
24°C 100.0%
19°C or below <1%
20°C <1%
21°C <1%
$58,720 Vol.
$58,720 Vol.
Sep 9, 2026
19°C or below
$1,559 Vol.
<1%
20°C
$1,970 Vol.
<1%
21°C
$1,840 Vol.
<1%
22°C
$5,010 Vol.
<1%
23°C
$10,960 Vol.
<1%
24°C
$10,917 Vol.
100%
25°C
$9,575 Vol.
<1%
26°C
$7,827 Vol.
<1%
27°C
$4,738 Vol.
<1%
28°C
$2,654 Vol.
<1%
29°C or higher
$1,674 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 9 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.Official meteorological observations from Environment and Climate Change Canada recorded a daily maximum of 24°C in Toronto on September 9, 2026, aligning precisely with the market's 100% implied probability for that outcome. Pre-event forecasts from multiple models anticipated highs near 23–26°C amid cloudy conditions and a southwest flow, with limited convective activity keeping temperatures from exceeding the observed peak. This consensus reflects the strong convergence between numerical weather prediction outputs, historical September averages around 23°C, and post-event verification data. Only a significant revision in station readings or a shift to an alternate measurement site could alter resolution, though such adjustments remain improbable given standardized protocols.
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 9 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 7, 2026, 8:56 AM ET
Volume
$58,720End Date
Sep 9, 2026Market Opened
Sep 7, 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 9 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.Official meteorological observations from Environment and Climate Change Canada recorded a daily maximum of 24°C in Toronto on September 9, 2026, aligning precisely with the market's 100% implied probability for that outcome. Pre-event forecasts from multiple models anticipated highs near 23–26°C amid cloudy conditions and a southwest flow, with limited convective activity keeping temperatures from exceeding the observed peak. This consensus reflects the strong convergence between numerical weather prediction outputs, historical September averages around 23°C, and post-event verification data. Only a significant revision in station readings or a shift to an alternate measurement site could alter resolution, though such adjustments remain improbable given standardized protocols.
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 9 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
$58,720End Date
Sep 9, 2026Market Opened
Sep 7, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Official meteorological observations from Environment and Climate Change Canada recorded a daily maximum of 24°C in Toronto on September 9, 2026, aligning precisely with the market's 100% implied probability for that outcome. Pre-event forecasts from multiple models anticipated highs near 23–26°C amid cloudy conditions and a southwest flow, with limited convective activity keeping temperatures from exceeding the observed peak. This consensus reflects the strong convergence between numerical weather prediction outputs, historical September averages around 23°C, and post-event verification data. Only a significant revision in station readings or a shift to an alternate measurement site could alter resolution, though such adjustments remain improbable given standardized protocols.
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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