Recent official forecasts from Environment Canada project a sunny high of 22°C for Toronto on September 25, with light northerly winds and minimal cloud cover supporting efficient daytime heating. This baseline aligns with the market's narrow lead for 22°C amid closely clustered probabilities across 18–23°C outcomes, reflecting typical short-range forecast spread in maximum temperature. Key variables include subtle shifts in steering flow, boundary-layer mixing, or minor model adjustments to insolation and advection, which can alter the daily peak by 1–2°C. Historical September averages near 18–20°C provide context, while the two-day horizon means the next Environment Canada update and ensemble runs will likely drive any odds shifts before resolution.
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 25?
Highest temperature in Toronto on September 25?
22°C 26%
21°C 24%
20°C 23%
23°C 21%
NEW
NEW
Sep 25, 2026
16°C or below
6%
17°C
4%
18°C
5%
19°C
19%
20°C
23%
21°C
24%
22°C
26%
23°C
21%
24°C
7%
25°C
4%
26°C or higher
2%
22°C 26%
21°C 24%
20°C 23%
23°C 21%
NEW
NEW
Sep 25, 2026
16°C or below
$10 Vol.
6%
17°C
$10 Vol.
4%
18°C
$0 Vol.
5%
19°C
$0 Vol.
19%
20°C
$0 Vol.
23%
21°C
$0 Vol.
24%
22°C
$0 Vol.
26%
23°C
$0 Vol.
21%
24°C
$0 Vol.
7%
25°C
$10 Vol.
4%
26°C or higher
$10 Vol.
2%
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 25 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 official forecasts from Environment Canada project a sunny high of 22°C for Toronto on September 25, with light northerly winds and minimal cloud cover supporting efficient daytime heating. This baseline aligns with the market's narrow lead for 22°C amid closely clustered probabilities across 18–23°C outcomes, reflecting typical short-range forecast spread in maximum temperature. Key variables include subtle shifts in steering flow, boundary-layer mixing, or minor model adjustments to insolation and advection, which can alter the daily peak by 1–2°C. Historical September averages near 18–20°C provide context, while the two-day horizon means the next Environment Canada update and ensemble runs will likely drive any odds shifts before resolution.
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 25 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 23, 2026, 8:55 AM ET
Volume
$40End Date
Sep 25, 2026Market Opened
Sep 23, 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 25 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 official forecasts from Environment Canada project a sunny high of 22°C for Toronto on September 25, with light northerly winds and minimal cloud cover supporting efficient daytime heating. This baseline aligns with the market's narrow lead for 22°C amid closely clustered probabilities across 18–23°C outcomes, reflecting typical short-range forecast spread in maximum temperature. Key variables include subtle shifts in steering flow, boundary-layer mixing, or minor model adjustments to insolation and advection, which can alter the daily peak by 1–2°C. Historical September averages near 18–20°C provide context, while the two-day horizon means the next Environment Canada update and ensemble runs will likely drive any odds shifts before resolution.
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 25 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
$40End Date
Sep 25, 2026Market Opened
Sep 23, 2026, 8:55 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Recent official forecasts from Environment Canada project a sunny high of 22°C for Toronto on September 25, with light northerly winds and minimal cloud cover supporting efficient daytime heating. This baseline aligns with the market's narrow lead for 22°C amid closely clustered probabilities across 18–23°C outcomes, reflecting typical short-range forecast spread in maximum temperature. Key variables include subtle shifts in steering flow, boundary-layer mixing, or minor model adjustments to insolation and advection, which can alter the daily peak by 1–2°C. Historical September averages near 18–20°C provide context, while the two-day horizon means the next Environment Canada update and ensemble runs will likely drive any odds shifts before resolution.
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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