Official forecasts from Environment Canada and aligned models project a Toronto overnight low near 19°C on August 30 amid increasing cloud cover and a 60% chance of showers from an approaching frontal system. Southerly to southwesterly flow advects warmer, moister air that limits radiative cooling, while elevated humidity and potential precipitation further moderate minimum temperatures above seasonal averages near 14°C. Trader consensus clusters tightly on 18–20°C outcomes because minor shifts in shower timing or model consensus on wind speeds can alter the exact low by 1–2°C. New guidance expected overnight will refine these variables ahead of resolution.
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 August 30?
19°C 32%
20°C 30%
21°C 27%
16°C 26%
14°C or below
13%
15°C
8%
16°C
26%
17°C
25%
18°C
26%
19°C
32%
20°C
30%
21°C
27%
22°C
5%
23°C
8%
24°C or higher
15%
19°C 32%
20°C 30%
21°C 27%
16°C 26%
14°C or below
13%
15°C
8%
16°C
26%
17°C
25%
18°C
26%
19°C
32%
20°C
30%
21°C
27%
22°C
5%
23°C
8%
24°C or higher
15%
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.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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: Aug 28, 2026, 2:29 PM 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.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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...Official forecasts from Environment Canada and aligned models project a Toronto overnight low near 19°C on August 30 amid increasing cloud cover and a 60% chance of showers from an approaching frontal system. Southerly to southwesterly flow advects warmer, moister air that limits radiative cooling, while elevated humidity and potential precipitation further moderate minimum temperatures above seasonal averages near 14°C. Trader consensus clusters tightly on 18–20°C outcomes because minor shifts in shower timing or model consensus on wind speeds can alter the exact low by 1–2°C. New guidance expected overnight will refine these variables 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
Beware of external links.
Beware of external links.
Frequently Asked Questions