Official forecasts from Environment Canada project a high of 26°C for Toronto on September 12 under cloudy skies with southeasterly flow, while multiple models cluster between 23–26°C amid partly cloudy conditions and light winds. This range reflects modest daytime heating from a warm air mass offset by increasing cloud cover and humidity, which limits peak insolation relative to clear-sky scenarios. Historical averages near 22.8°C provide baseline context, yet recent model runs show slight upward revisions tied to steering patterns. The tight market spread between 25°C and 26°C outcomes captures genuine forecast uncertainty around exact maximum readings, which depend on precise timing of any breaks in cloud and the official reporting station. Updated model guidance and afternoon observations will refine these probabilities ahead of 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 12?
Highest temperature in Toronto on September 12?
25°C 35%
26°C 27%
24°C 16%
27°C 14%
NEW
NEW
Sep 12, 2026
21°C or below
1%
22°C
2%
23°C
5%
24°C
16%
25°C
35%
26°C
27%
27°C
14%
28°C
4%
29°C
3%
30°C
1%
31°C or higher
1%
25°C 35%
26°C 27%
24°C 16%
27°C 14%
NEW
NEW
Sep 12, 2026
21°C or below
$291 Vol.
1%
22°C
$118 Vol.
2%
23°C
$465 Vol.
5%
24°C
$1,293 Vol.
16%
25°C
$1,238 Vol.
35%
26°C
$794 Vol.
27%
27°C
$474 Vol.
14%
28°C
$176 Vol.
4%
29°C
$211 Vol.
3%
30°C
$212 Vol.
1%
31°C or higher
$466 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 12 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 forecasts from Environment Canada project a high of 26°C for Toronto on September 12 under cloudy skies with southeasterly flow, while multiple models cluster between 23–26°C amid partly cloudy conditions and light winds. This range reflects modest daytime heating from a warm air mass offset by increasing cloud cover and humidity, which limits peak insolation relative to clear-sky scenarios. Historical averages near 22.8°C provide baseline context, yet recent model runs show slight upward revisions tied to steering patterns. The tight market spread between 25°C and 26°C outcomes captures genuine forecast uncertainty around exact maximum readings, which depend on precise timing of any breaks in cloud and the official reporting station. Updated model guidance and afternoon observations will refine these probabilities ahead of 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 12 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 10, 2026, 8:56 AM ET
Volume
$5,736End Date
Sep 12, 2026Market Opened
Sep 10, 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 12 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 forecasts from Environment Canada project a high of 26°C for Toronto on September 12 under cloudy skies with southeasterly flow, while multiple models cluster between 23–26°C amid partly cloudy conditions and light winds. This range reflects modest daytime heating from a warm air mass offset by increasing cloud cover and humidity, which limits peak insolation relative to clear-sky scenarios. Historical averages near 22.8°C provide baseline context, yet recent model runs show slight upward revisions tied to steering patterns. The tight market spread between 25°C and 26°C outcomes captures genuine forecast uncertainty around exact maximum readings, which depend on precise timing of any breaks in cloud and the official reporting station. Updated model guidance and afternoon observations will refine these probabilities ahead of 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 12 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
$5,736End Date
Sep 12, 2026Market Opened
Sep 10, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Official forecasts from Environment Canada project a high of 26°C for Toronto on September 12 under cloudy skies with southeasterly flow, while multiple models cluster between 23–26°C amid partly cloudy conditions and light winds. This range reflects modest daytime heating from a warm air mass offset by increasing cloud cover and humidity, which limits peak insolation relative to clear-sky scenarios. Historical averages near 22.8°C provide baseline context, yet recent model runs show slight upward revisions tied to steering patterns. The tight market spread between 25°C and 26°C outcomes captures genuine forecast uncertainty around exact maximum readings, which depend on precise timing of any breaks in cloud and the official reporting station. Updated model guidance and afternoon observations will refine these probabilities ahead of 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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