Current observational data from Toronto monitoring stations show a daily maximum of 25°C under mostly cloudy skies, light northerly winds, and low precipitation chances, aligning with model consensus from agencies like Environment and Climate Change Canada. This exceeds the 1991–2020 average high of roughly 22°C for mid-September yet falls well below historical extremes near 33°C, supporting the market's near-certain outcome. Forecasters note typical late-summer variability from shifting high-pressure systems, with any post-peak cooling or measurement adjustments representing the main realistic variables that could alter final tallies before official daily summaries close.
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 16?
Highest temperature in Toronto on September 16?
25°C 100.0%
18°C or below <1%
19°C <1%
20°C <1%
$53,182 Vol.
$53,182 Vol.
Sep 16, 2026
18°C or below
<1%
19°C
<1%
20°C
<1%
21°C
<1%
22°C
<1%
23°C
<1%
24°C
<1%
25°C
100%
26°C
<1%
27°C
<1%
28°C or higher
<1%
25°C 100.0%
18°C or below <1%
19°C <1%
20°C <1%
$53,182 Vol.
$53,182 Vol.
Sep 16, 2026
18°C or below
$175 Vol.
<1%
19°C
$503 Vol.
<1%
20°C
$429 Vol.
<1%
21°C
$1,024 Vol.
<1%
22°C
$2,876 Vol.
<1%
23°C
$10,483 Vol.
<1%
24°C
$8,639 Vol.
<1%
25°C
$9,883 Vol.
100%
26°C
$9,002 Vol.
<1%
27°C
$8,017 Vol.
<1%
28°C or higher
$2,152 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 16 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 observational data from Toronto monitoring stations show a daily maximum of 25°C under mostly cloudy skies, light northerly winds, and low precipitation chances, aligning with model consensus from agencies like Environment and Climate Change Canada. This exceeds the 1991–2020 average high of roughly 22°C for mid-September yet falls well below historical extremes near 33°C, supporting the market's near-certain outcome. Forecasters note typical late-summer variability from shifting high-pressure systems, with any post-peak cooling or measurement adjustments representing the main realistic variables that could alter final tallies before official daily summaries close.
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 16 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 14, 2026, 8:56 AM ET
Volume
$53,182End Date
Sep 16, 2026Market Opened
Sep 14, 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 16 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 observational data from Toronto monitoring stations show a daily maximum of 25°C under mostly cloudy skies, light northerly winds, and low precipitation chances, aligning with model consensus from agencies like Environment and Climate Change Canada. This exceeds the 1991–2020 average high of roughly 22°C for mid-September yet falls well below historical extremes near 33°C, supporting the market's near-certain outcome. Forecasters note typical late-summer variability from shifting high-pressure systems, with any post-peak cooling or measurement adjustments representing the main realistic variables that could alter final tallies before official daily summaries close.
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 16 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
$53,182End Date
Sep 16, 2026Market Opened
Sep 14, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Current observational data from Toronto monitoring stations show a daily maximum of 25°C under mostly cloudy skies, light northerly winds, and low precipitation chances, aligning with model consensus from agencies like Environment and Climate Change Canada. This exceeds the 1991–2020 average high of roughly 22°C for mid-September yet falls well below historical extremes near 33°C, supporting the market's near-certain outcome. Forecasters note typical late-summer variability from shifting high-pressure systems, with any post-peak cooling or measurement adjustments representing the main realistic variables that could alter final tallies before official daily summaries close.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions