Forecasts from meteorological models and official sources indicate a maximum temperature of 28–29°C for Shanghai on September 22, 2026, under partly cloudy to overcast skies with light northeasterly winds and moderate humidity levels around 60–70%. This consensus aligns with late-September climatology for the region, where typical highs range near 28°C amid stable atmospheric conditions and limited daytime heating from reduced insolation. Trader positioning at 92% implied probability for 28°C reflects the tight clustering of ensemble outputs and real-time observations showing temperatures climbing into the upper 20s by midday. A shift toward clearer skies or stronger southerly flow could push readings to 30°C, though current guidance assigns low likelihood to such changes before the daily peak.
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 22?
28°C 94%
29°C 8%
30°C <1%
31°C <1%
$60,079 Vol.
$60,079 Vol.
24°C or below
<1%
25°C
<1%
26°C
<1%
27°C
<1%
28°C
94%
29°C
8%
30°C
<1%
31°C
<1%
32°C
<1%
33°C
<1%
34°C or higher
<1%
28°C 94%
29°C 8%
30°C <1%
31°C <1%
$60,079 Vol.
$60,079 Vol.
24°C or below
<1%
25°C
<1%
26°C
<1%
27°C
<1%
28°C
94%
29°C
8%
30°C
<1%
31°C
<1%
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 20, 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...Forecasts from meteorological models and official sources indicate a maximum temperature of 28–29°C for Shanghai on September 22, 2026, under partly cloudy to overcast skies with light northeasterly winds and moderate humidity levels around 60–70%. This consensus aligns with late-September climatology for the region, where typical highs range near 28°C amid stable atmospheric conditions and limited daytime heating from reduced insolation. Trader positioning at 92% implied probability for 28°C reflects the tight clustering of ensemble outputs and real-time observations showing temperatures climbing into the upper 20s by midday. A shift toward clearer skies or stronger southerly flow could push readings to 30°C, though current guidance assigns low likelihood to such changes before the daily peak.
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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