Recent forecast models from agencies and services including GFS and ECMWF indicate Shanghai's September 8 high will most likely reach 29–30°C under partly cloudy skies with northerly winds and low precipitation chances. Consensus among short-range runs supports these values given current surface observations in the mid- to upper-20s and stable autumn steering patterns that limit rapid warming or cooling. Trader emphasis on the 30°C outcome reflects the tight clustering of guidance near this threshold, while lower probabilities for 31°C or 28°C account for typical model spread and potential timing of peak heating. Updated model runs and official China Meteorological Administration briefings in the next 12–24 hours will provide the clearest resolution signals before the daily maximum is recorded.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Shanghai on September 8?
30°C 62%
29°C 34%
31°C 4%
28°C 3%
$25,212 Vol.
$25,212 Vol.
24°C or below
<1%
25°C
<1%
26°C
<1%
27°C
<1%
28°C
3%
29°C
34%
30°C
62%
31°C
4%
32°C
<1%
33°C
<1%
34°C or higher
<1%
30°C 62%
29°C 34%
31°C 4%
28°C 3%
$25,212 Vol.
$25,212 Vol.
24°C or below
<1%
25°C
<1%
26°C
<1%
27°C
<1%
28°C
3%
29°C
34%
30°C
62%
31°C
4%
32°C
<1%
33°C
<1%
34°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=zspd
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 6, 2026, 12:56 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=zspdResolver
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=zspd
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=zspdResolver
0x69c47De9D...Recent forecast models from agencies and services including GFS and ECMWF indicate Shanghai's September 8 high will most likely reach 29–30°C under partly cloudy skies with northerly winds and low precipitation chances. Consensus among short-range runs supports these values given current surface observations in the mid- to upper-20s and stable autumn steering patterns that limit rapid warming or cooling. Trader emphasis on the 30°C outcome reflects the tight clustering of guidance near this threshold, while lower probabilities for 31°C or 28°C account for typical model spread and potential timing of peak heating. Updated model runs and official China Meteorological Administration briefings in the next 12–24 hours will provide the clearest resolution signals before the daily maximum is recorded.
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