Current short-range forecast models from Environment Canada and others indicate a minimum temperature near 15–17°C for Toronto on September 17, driven by a mild airmass with light northerly winds, partial cloud cover, and limited nocturnal radiative cooling under a weak high-pressure ridge. Trader sentiment remains closely balanced across outcomes because small shifts in overnight cloud thickness, dew-point depression, or frontal timing can alter the exact minimum by several degrees. Clearer skies would enhance longwave radiation loss and favor readings at or below 15°C, while increased low-level moisture or mixing would limit cooling and support values near 17–18°C. The 35% odds on extremes (11°C or below versus 21°C or higher) reflect residual model spread and the narrow window before resolution, underscoring how modest changes in boundary-layer conditions can swing the recorded low.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Toronto on September 17?
Lowest temperature in Toronto on September 17?
11°C or below 71%
21°C or higher 70%
14°C 40%
12°C 37%
NEW
NEW
Sep 17, 2026
11°C or below
71%
12°C
37%
13°C
37%
14°C
40%
15°C
32%
16°C
22%
17°C
19%
18°C
19%
19°C
37%
20°C
37%
21°C or higher
70%
11°C or below 71%
21°C or higher 70%
14°C 40%
12°C 37%
NEW
NEW
Sep 17, 2026
11°C or below
$0 Vol.
71%
12°C
$0 Vol.
37%
13°C
$0 Vol.
37%
14°C
$0 Vol.
40%
15°C
$0 Vol.
32%
16°C
$0 Vol.
22%
17°C
$0 Vol.
19%
18°C
$0 Vol.
19%
19°C
$0 Vol.
37%
20°C
$0 Vol.
37%
21°C or higher
$0 Vol.
70%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 17 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 short-range forecast models from Environment Canada and others indicate a minimum temperature near 15–17°C for Toronto on September 17, driven by a mild airmass with light northerly winds, partial cloud cover, and limited nocturnal radiative cooling under a weak high-pressure ridge. Trader sentiment remains closely balanced across outcomes because small shifts in overnight cloud thickness, dew-point depression, or frontal timing can alter the exact minimum by several degrees. Clearer skies would enhance longwave radiation loss and favor readings at or below 15°C, while increased low-level moisture or mixing would limit cooling and support values near 17–18°C. The 35% odds on extremes (11°C or below versus 21°C or higher) reflect residual model spread and the narrow window before resolution, underscoring how modest changes in boundary-layer conditions can swing the recorded low.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 17 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 lowest 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 15, 2026, 8:29 AM ET
Volume
$0End Date
Sep 17, 2026Market Opened
Sep 15, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 17 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 short-range forecast models from Environment Canada and others indicate a minimum temperature near 15–17°C for Toronto on September 17, driven by a mild airmass with light northerly winds, partial cloud cover, and limited nocturnal radiative cooling under a weak high-pressure ridge. Trader sentiment remains closely balanced across outcomes because small shifts in overnight cloud thickness, dew-point depression, or frontal timing can alter the exact minimum by several degrees. Clearer skies would enhance longwave radiation loss and favor readings at or below 15°C, while increased low-level moisture or mixing would limit cooling and support values near 17–18°C. The 35% odds on extremes (11°C or below versus 21°C or higher) reflect residual model spread and the narrow window before resolution, underscoring how modest changes in boundary-layer conditions can swing the recorded low.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Toronto Pearson Intl Airport Station in degrees Celsius on 17 Sep '26.
The resolution source for this market will be information from NOAA, specifically the lowest 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 lowest 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
$0End Date
Sep 17, 2026Market Opened
Sep 15, 2026, 8:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Current short-range forecast models from Environment Canada and others indicate a minimum temperature near 15–17°C for Toronto on September 17, driven by a mild airmass with light northerly winds, partial cloud cover, and limited nocturnal radiative cooling under a weak high-pressure ridge. Trader sentiment remains closely balanced across outcomes because small shifts in overnight cloud thickness, dew-point depression, or frontal timing can alter the exact minimum by several degrees. Clearer skies would enhance longwave radiation loss and favor readings at or below 15°C, while increased low-level moisture or mixing would limit cooling and support values near 17–18°C. The 35% odds on extremes (11°C or below versus 21°C or higher) reflect residual model spread and the narrow window before resolution, underscoring how modest changes in boundary-layer conditions can swing the recorded low.
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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