Official temperature observations from Environment Canada stations, including Pearson International Airport, recorded a daily maximum of 23°C in Toronto on September 15, 2026, under mostly cloudy skies with light southerly winds and limited solar heating. This aligned closely with pre-event model consensus from GFS and regional forecasts projecting highs near 22–24°C amid a stable air mass following cooler conditions earlier in the month. Trader consensus at near-100% for 23°C reflects high confidence in these verified measurements over historical averages of about 22°C. Minor revisions in station data or differing microclimate readings could theoretically shift the exact value, though such adjustments are rare after initial reporting.
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 15?
Highest temperature in Toronto on September 15?
23°C 100.0%
16°C or below <1%
17°C <1%
18°C <1%
$72,337 Vol.
$72,337 Vol.
Sep 15, 2026
16°C or below
No
17°C
No
18°C
No
19°C
No
20°C
No
21°C
No
22°C
No
23°C
Yes
24°C
No
25°C
No
26°C or higher
No
23°C 100.0%
16°C or below <1%
17°C <1%
18°C <1%
$72,337 Vol.
$72,337 Vol.
Sep 15, 2026
16°C or below
$1,653 Vol.
No
17°C
$141 Vol.
No
18°C
$6,206 Vol.
No
19°C
$2,081 Vol.
No
20°C
$2,752 Vol.
No
21°C
$10,404 Vol.
No
22°C
$15,617 Vol.
No
23°C
$9,943 Vol.
Yes
24°C
$17,250 Vol.
No
25°C
$3,692 Vol.
No
26°C or higher
$2,598 Vol.
No
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 15 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 temperature observations from Environment Canada stations, including Pearson International Airport, recorded a daily maximum of 23°C in Toronto on September 15, 2026, under mostly cloudy skies with light southerly winds and limited solar heating. This aligned closely with pre-event model consensus from GFS and regional forecasts projecting highs near 22–24°C amid a stable air mass following cooler conditions earlier in the month. Trader consensus at near-100% for 23°C reflects high confidence in these verified measurements over historical averages of about 22°C. Minor revisions in station data or differing microclimate readings could theoretically shift the exact value, though such adjustments are rare after initial reporting.
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 15 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 13, 2026, 12:56 PM ET
Volume
$72,337End Date
Sep 15, 2026Market Opened
Sep 13, 2026, 12:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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 15 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 temperature observations from Environment Canada stations, including Pearson International Airport, recorded a daily maximum of 23°C in Toronto on September 15, 2026, under mostly cloudy skies with light southerly winds and limited solar heating. This aligned closely with pre-event model consensus from GFS and regional forecasts projecting highs near 22–24°C amid a stable air mass following cooler conditions earlier in the month. Trader consensus at near-100% for 23°C reflects high confidence in these verified measurements over historical averages of about 22°C. Minor revisions in station data or differing microclimate readings could theoretically shift the exact value, though such adjustments are rare after initial reporting.
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 15 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
$72,337End Date
Sep 15, 2026Market Opened
Sep 13, 2026, 12:56 PM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official temperature observations from Environment Canada stations, including Pearson International Airport, recorded a daily maximum of 23°C in Toronto on September 15, 2026, under mostly cloudy skies with light southerly winds and limited solar heating. This aligned closely with pre-event model consensus from GFS and regional forecasts projecting highs near 22–24°C amid a stable air mass following cooler conditions earlier in the month. Trader consensus at near-100% for 23°C reflects high confidence in these verified measurements over historical averages of about 22°C. Minor revisions in station data or differing microclimate readings could theoretically shift the exact value, though such adjustments are rare after initial reporting.
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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