Recent forecasts from Environment Canada and multiple models point to a Toronto high of 18–20°C on September 24 under persistent high pressure and easterly winds that limit daytime warming while maintaining clear skies. This consensus, aligned with the September climatological average of 20°C, underpins the market’s heaviest weighting on 19°C. Model runs show minimal spread, with little expected change from upstream ridging or frontal passages before the date. Traders appear to discount outlier warmer scenarios given the moderating marine influence and stable pattern, though small revisions in afternoon mixing or wind shifts could still nudge the recorded maximum within the clustered 18–20°C range.
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 24?
Highest temperature in Toronto on September 24?
19°C 47%
20°C 25%
18°C 21%
17°C 15%
NEW
NEW
Sep 24, 2026
14°C or below
7%
15°C
7%
16°C
6%
17°C
15%
18°C
21%
19°C
47%
20°C
25%
21°C
11%
22°C
6%
23°C
4%
24°C or higher
4%
19°C 47%
20°C 25%
18°C 21%
17°C 15%
NEW
NEW
Sep 24, 2026
14°C or below
$10 Vol.
7%
15°C
$10 Vol.
7%
16°C
$17 Vol.
6%
17°C
$0 Vol.
15%
18°C
$0 Vol.
21%
19°C
$73 Vol.
47%
20°C
$0 Vol.
25%
21°C
$0 Vol.
11%
22°C
$10 Vol.
6%
23°C
$10 Vol.
4%
24°C or higher
$10 Vol.
4%
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 24 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 Environment Canada and multiple models point to a Toronto high of 18–20°C on September 24 under persistent high pressure and easterly winds that limit daytime warming while maintaining clear skies. This consensus, aligned with the September climatological average of 20°C, underpins the market’s heaviest weighting on 19°C. Model runs show minimal spread, with little expected change from upstream ridging or frontal passages before the date. Traders appear to discount outlier warmer scenarios given the moderating marine influence and stable pattern, though small revisions in afternoon mixing or wind shifts could still nudge the recorded maximum within the clustered 18–20°C range.
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 24 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 22, 2026, 8:56 AM ET
Volume
$139End Date
Sep 24, 2026Market Opened
Sep 22, 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 24 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 Environment Canada and multiple models point to a Toronto high of 18–20°C on September 24 under persistent high pressure and easterly winds that limit daytime warming while maintaining clear skies. This consensus, aligned with the September climatological average of 20°C, underpins the market’s heaviest weighting on 19°C. Model runs show minimal spread, with little expected change from upstream ridging or frontal passages before the date. Traders appear to discount outlier warmer scenarios given the moderating marine influence and stable pattern, though small revisions in afternoon mixing or wind shifts could still nudge the recorded maximum within the clustered 18–20°C range.
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 24 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
$139End Date
Sep 24, 2026Market Opened
Sep 22, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Recent forecasts from Environment Canada and multiple models point to a Toronto high of 18–20°C on September 24 under persistent high pressure and easterly winds that limit daytime warming while maintaining clear skies. This consensus, aligned with the September climatological average of 20°C, underpins the market’s heaviest weighting on 19°C. Model runs show minimal spread, with little expected change from upstream ridging or frontal passages before the date. Traders appear to discount outlier warmer scenarios given the moderating marine influence and stable pattern, though small revisions in afternoon mixing or wind shifts could still nudge the recorded maximum within the clustered 18–20°C range.
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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