Current forecasts from meteorological models and official monitoring indicate Toronto is on track for a daily high of 28°C on September 13, driven by warm air advection under partly cloudy conditions with light to moderate westerly winds. This aligns with surface observations and ensemble consensus showing temperatures peaking in the late afternoon before cooling overnight, consistent with late-summer climatology where highs near 23°C are typical but elevated this year due to regional warmth. Market-implied odds reflect trader confidence in these real-time data streams resolving exactly at that threshold. A shift in final verified readings from primary stations, such as Toronto Pearson International Airport, or post-event model adjustments could alter outcomes if actual peaks fall short or exceed due to localized microclimate effects.
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 13?
28°C 100.0%
19°C or below <1%
20°C <1%
21°C <1%
$38,659 Vol.
$38,659 Vol.
19°C or below
<1%
20°C
<1%
21°C
<1%
22°C
<1%
23°C
<1%
24°C
<1%
25°C
<1%
26°C
<1%
27°C
<1%
28°C
100%
29°C or higher
<1%
28°C 100.0%
19°C or below <1%
20°C <1%
21°C <1%
$38,659 Vol.
$38,659 Vol.
19°C or below
<1%
20°C
<1%
21°C
<1%
22°C
<1%
23°C
<1%
24°C
<1%
25°C
<1%
26°C
<1%
27°C
<1%
28°C
100%
29°C or higher
<1%
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 11, 2026, 8:56 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Current forecasts from meteorological models and official monitoring indicate Toronto is on track for a daily high of 28°C on September 13, driven by warm air advection under partly cloudy conditions with light to moderate westerly winds. This aligns with surface observations and ensemble consensus showing temperatures peaking in the late afternoon before cooling overnight, consistent with late-summer climatology where highs near 23°C are typical but elevated this year due to regional warmth. Market-implied odds reflect trader confidence in these real-time data streams resolving exactly at that threshold. A shift in final verified readings from primary stations, such as Toronto Pearson International Airport, or post-event model adjustments could alter outcomes if actual peaks fall short or exceed due to localized microclimate effects.
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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