Recent forecasts from Environment Canada and multiple models indicate sunny conditions with a high near 22°C for Toronto on September 18, driven by a stable high-pressure ridge and northerly flow that limits afternoon warming compared to the prior day's 25°C reading. This setup aligns closely with the September climatological average high of 21.4°C while reflecting the month's overall +3°C anomaly to date. Model consensus shows minimal spread, with peak temperatures most likely occurring in the early afternoon under partly cloudy skies and light winds, positioning 21–22°C as the dominant outcomes in trader-implied probabilities. Updated model runs and official briefings tomorrow morning represent the key data points that could refine these odds 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 18?
Highest temperature in Toronto on September 18?
21°C 51%
22°C 32%
20°C 13%
23°C 4%
NEW
NEW
Sep 18, 2026
14°C or below
<1%
15°C
<1%
16°C
<1%
17°C
2%
18°C
1%
19°C
3%
20°C
13%
21°C
51%
22°C
32%
23°C
4%
24°C or higher
1%
21°C 51%
22°C 32%
20°C 13%
23°C 4%
NEW
NEW
Sep 18, 2026
14°C or below
$45 Vol.
<1%
15°C
$45 Vol.
<1%
16°C
$45 Vol.
<1%
17°C
$32 Vol.
2%
18°C
$175 Vol.
1%
19°C
$237 Vol.
3%
20°C
$466 Vol.
13%
21°C
$1,372 Vol.
51%
22°C
$689 Vol.
32%
23°C
$218 Vol.
4%
24°C or higher
$218 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 18 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.Recent forecasts from Environment Canada and multiple models indicate sunny conditions with a high near 22°C for Toronto on September 18, driven by a stable high-pressure ridge and northerly flow that limits afternoon warming compared to the prior day's 25°C reading. This setup aligns closely with the September climatological average high of 21.4°C while reflecting the month's overall +3°C anomaly to date. Model consensus shows minimal spread, with peak temperatures most likely occurring in the early afternoon under partly cloudy skies and light winds, positioning 21–22°C as the dominant outcomes in trader-implied probabilities. Updated model runs and official briefings tomorrow morning represent the key data points that could refine these odds 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 18 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 16, 2026, 8:56 AM ET
Volume
$3,543End Date
Sep 18, 2026Market Opened
Sep 16, 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 18 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.Recent forecasts from Environment Canada and multiple models indicate sunny conditions with a high near 22°C for Toronto on September 18, driven by a stable high-pressure ridge and northerly flow that limits afternoon warming compared to the prior day's 25°C reading. This setup aligns closely with the September climatological average high of 21.4°C while reflecting the month's overall +3°C anomaly to date. Model consensus shows minimal spread, with peak temperatures most likely occurring in the early afternoon under partly cloudy skies and light winds, positioning 21–22°C as the dominant outcomes in trader-implied probabilities. Updated model runs and official briefings tomorrow morning represent the key data points that could refine these odds 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 18 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
$3,543End Date
Sep 18, 2026Market Opened
Sep 16, 2026, 8:56 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Recent forecasts from Environment Canada and multiple models indicate sunny conditions with a high near 22°C for Toronto on September 18, driven by a stable high-pressure ridge and northerly flow that limits afternoon warming compared to the prior day's 25°C reading. This setup aligns closely with the September climatological average high of 21.4°C while reflecting the month's overall +3°C anomaly to date. Model consensus shows minimal spread, with peak temperatures most likely occurring in the early afternoon under partly cloudy skies and light winds, positioning 21–22°C as the dominant outcomes in trader-implied probabilities. Updated model runs and official briefings tomorrow morning represent the key data points that could refine these odds 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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