Current forecasts for Toronto on September 17 point to a maximum near 21–23°C under partly cloudy skies with light northerly winds and a modest chance of drizzle, keeping surface heating limited. Model consensus emphasizes reduced solar insolation from persistent cloud cover and minimal advection of warmer air masses, aligning with the historical September 17 average high of about 22°C. Trader sentiment clusters on 22–24°C outcomes because these thresholds best match the latest ensemble runs, while higher readings would require clearer skies or stronger southerly flow that current guidance does not support. Updated National Weather Service or Environment Canada model releases in the next 48 hours remain the key variables that could shift implied probabilities.
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 17?
Highest temperature in Toronto on September 17?
23°C 26%
24°C 21%
22°C 18%
26°C 12%
NEW
NEW
Sep 17, 2026
19°C or below
7%
20°C
10%
21°C
6%
22°C
18%
23°C
26%
24°C
21%
25°C
10%
26°C
12%
27°C
7%
28°C
7%
29°C or higher
6%
23°C 26%
24°C 21%
22°C 18%
26°C 12%
NEW
NEW
Sep 17, 2026
19°C or below
$0 Vol.
7%
20°C
$10 Vol.
10%
21°C
$10 Vol.
6%
22°C
$12 Vol.
18%
23°C
$16 Vol.
26%
24°C
$139 Vol.
21%
25°C
$15 Vol.
10%
26°C
$0 Vol.
12%
27°C
$7 Vol.
7%
28°C
$0 Vol.
7%
29°C or higher
$33 Vol.
6%
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 17 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.Current forecasts for Toronto on September 17 point to a maximum near 21–23°C under partly cloudy skies with light northerly winds and a modest chance of drizzle, keeping surface heating limited. Model consensus emphasizes reduced solar insolation from persistent cloud cover and minimal advection of warmer air masses, aligning with the historical September 17 average high of about 22°C. Trader sentiment clusters on 22–24°C outcomes because these thresholds best match the latest ensemble runs, while higher readings would require clearer skies or stronger southerly flow that current guidance does not support. Updated National Weather Service or Environment Canada model releases in the next 48 hours remain the key variables that could shift implied probabilities.
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 17 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 15, 2026, 8:56 AM ET
Volume
$242End Date
Sep 17, 2026Market Opened
Sep 15, 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 17 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.Current forecasts for Toronto on September 17 point to a maximum near 21–23°C under partly cloudy skies with light northerly winds and a modest chance of drizzle, keeping surface heating limited. Model consensus emphasizes reduced solar insolation from persistent cloud cover and minimal advection of warmer air masses, aligning with the historical September 17 average high of about 22°C. Trader sentiment clusters on 22–24°C outcomes because these thresholds best match the latest ensemble runs, while higher readings would require clearer skies or stronger southerly flow that current guidance does not support. Updated National Weather Service or Environment Canada model releases in the next 48 hours remain the key variables that could shift implied probabilities.
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 17 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
$242End Date
Sep 17, 2026Market Opened
Sep 15, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Current forecasts for Toronto on September 17 point to a maximum near 21–23°C under partly cloudy skies with light northerly winds and a modest chance of drizzle, keeping surface heating limited. Model consensus emphasizes reduced solar insolation from persistent cloud cover and minimal advection of warmer air masses, aligning with the historical September 17 average high of about 22°C. Trader sentiment clusters on 22–24°C outcomes because these thresholds best match the latest ensemble runs, while higher readings would require clearer skies or stronger southerly flow that current guidance does not support. Updated National Weather Service or Environment Canada model releases in the next 48 hours remain the key variables that could shift implied probabilities.
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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