Recent forecasts from multiple meteorological sources converge on a maximum temperature of 28–29°C for Shanghai on September 17, driven by persistent easterly to northeasterly flow advecting moist maritime air from the East China Sea. This pattern supports light rain or overcast conditions that limit daytime solar heating and suppress peaks above 29°C. Current observations on September 16 show highs near 29–30°C under partly cloudy skies, with the incoming moisture expected to moderate temperatures slightly. Model consensus and historical late-September climatology for the region reinforce the market-implied emphasis on 28°C, as stronger warming would require clearer skies or a shift to drier westerly flow, which is not indicated in near-term guidance.
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 17?
28°C 63%
29°C 24%
27°C 14%
30°C 2%
$21,331 Vol.
$21,331 Vol.
25°C or below
<1%
26°C
1%
27°C
14%
28°C
63%
29°C
24%
30°C
2%
31°C
<1%
32°C
<1%
33°C
<1%
34°C
<1%
35°C or higher
<1%
28°C 63%
29°C 24%
27°C 14%
30°C 2%
$21,331 Vol.
$21,331 Vol.
25°C or below
<1%
26°C
1%
27°C
14%
28°C
63%
29°C
24%
30°C
2%
31°C
<1%
32°C
<1%
33°C
<1%
34°C
<1%
35°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 15, 2026, 12:57 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 forecasts from multiple meteorological sources converge on a maximum temperature of 28–29°C for Shanghai on September 17, driven by persistent easterly to northeasterly flow advecting moist maritime air from the East China Sea. This pattern supports light rain or overcast conditions that limit daytime solar heating and suppress peaks above 29°C. Current observations on September 16 show highs near 29–30°C under partly cloudy skies, with the incoming moisture expected to moderate temperatures slightly. Model consensus and historical late-September climatology for the region reinforce the market-implied emphasis on 28°C, as stronger warming would require clearer skies or a shift to drier westerly flow, which is not indicated in near-term guidance.
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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