Official forecasts from meteorological models and agencies indicate a daytime high of 28°C in Shanghai on September 9 under partly cloudy skies, with light northerly winds limiting mixing and allowing surface temperatures to peak near that level amid typical early-September humidity and solar angles. Recent observational data showing afternoon readings around 27°C align with this consensus, reinforcing trader positioning at near-certainty for the exact threshold. Minor deviations remain possible if localized cloud cover thickens unexpectedly or if urban heat island effects push readings marginally higher in central districts, though current model runs show limited divergence on these factors.
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 9?
28°C 100.0%
24°C or below <1%
25°C <1%
26°C <1%
$71,620 Vol.
$71,620 Vol.
24°C or below
No
25°C
No
26°C
No
27°C
No
28°C
Yes
29°C
No
30°C
No
31°C
No
32°C
No
33°C
No
34°C or higher
No
28°C 100.0%
24°C or below <1%
25°C <1%
26°C <1%
$71,620 Vol.
$71,620 Vol.
24°C or below
No
25°C
No
26°C
No
27°C
No
28°C
Yes
29°C
No
30°C
No
31°C
No
32°C
No
33°C
No
34°C or higher
No
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 7, 2026, 12:56 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=zspdResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
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...Outcome proposed: No
No dispute
Final outcome: No
Official forecasts from meteorological models and agencies indicate a daytime high of 28°C in Shanghai on September 9 under partly cloudy skies, with light northerly winds limiting mixing and allowing surface temperatures to peak near that level amid typical early-September humidity and solar angles. Recent observational data showing afternoon readings around 27°C align with this consensus, reinforcing trader positioning at near-certainty for the exact threshold. Minor deviations remain possible if localized cloud cover thickens unexpectedly or if urban heat island effects push readings marginally higher in central districts, though current model runs show limited divergence on these factors.
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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