Recent model runs from Environment Canada and GFS ensembles point to clear skies and light northeast winds over Toronto on September 6, favoring modest nocturnal radiative cooling under high pressure rather than strong advection. This setup supports overnight lows near the 1991–2020 climatological average of 15.5 °C, with most guidance clustering between 14–17 °C. The near-even market distribution across 12–20 °C outcomes reflects remaining spread among ensemble members and sensitivity to exact timing of any residual cloud or wind shifts. Updated 00Z and 12Z model cycles plus Environment Canada’s evening briefing will provide the next resolution-relevant data points before the minimum is observed.
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 6?
20°C or higher 69%
12°C 48%
13°C 48%
14°C 48%
10°C or below
-
11°C
20%
12°C
48%
13°C
48%
14°C
48%
15°C
32%
16°C
27%
17°C
25%
18°C
48%
19°C
31%
20°C or higher
69%
20°C or higher 69%
12°C 48%
13°C 48%
14°C 48%
10°C or below
-
11°C
20%
12°C
48%
13°C
48%
14°C
48%
15°C
32%
16°C
27%
17°C
25%
18°C
48%
19°C
31%
20°C or higher
69%
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 4, 2026, 8:29 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 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.
Resolution Source
https://www.weather.gov/wrh/timeseries?site=cyyzResolver
0x69c47De9D...Recent model runs from Environment Canada and GFS ensembles point to clear skies and light northeast winds over Toronto on September 6, favoring modest nocturnal radiative cooling under high pressure rather than strong advection. This setup supports overnight lows near the 1991–2020 climatological average of 15.5 °C, with most guidance clustering between 14–17 °C. The near-even market distribution across 12–20 °C outcomes reflects remaining spread among ensemble members and sensitivity to exact timing of any residual cloud or wind shifts. Updated 00Z and 12Z model cycles plus Environment Canada’s evening briefing will provide the next resolution-relevant data points before the minimum is observed.
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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