Latest numerical weather models, including consensus runs from global and regional systems, position Shanghai’s maximum temperature on September 13 near 29–30 °C under stable high-pressure conditions with light northeasterly flow and minimal cloud cover. This alignment with seasonal September climatology—where daily highs typically range 27–30 °C—has concentrated trader sentiment on the 29 °C and 30 °C outcomes, which together exceed 75 % implied probability. Recent model updates have shown little shift in the expected peak, with only modest uncertainty from boundary-layer mixing and urban heat-island effects that could nudge readings by 1 °C. Official station data from the China Meteorological Administration, reported after local sunset, will determine final resolution.
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 13?
29°C 50%
30°C 28%
28°C 13%
31°C 7%
$10,644 Vol.
$10,644 Vol.
26°C or below
<1%
27°C
3%
28°C
13%
29°C
50%
30°C
28%
31°C
7%
32°C
2%
33°C
<1%
34°C
<1%
35°C
<1%
36°C or higher
<1%
29°C 50%
30°C 28%
28°C 13%
31°C 7%
$10,644 Vol.
$10,644 Vol.
26°C or below
<1%
27°C
3%
28°C
13%
29°C
50%
30°C
28%
31°C
7%
32°C
2%
33°C
<1%
34°C
<1%
35°C
<1%
36°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 11, 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...Latest numerical weather models, including consensus runs from global and regional systems, position Shanghai’s maximum temperature on September 13 near 29–30 °C under stable high-pressure conditions with light northeasterly flow and minimal cloud cover. This alignment with seasonal September climatology—where daily highs typically range 27–30 °C—has concentrated trader sentiment on the 29 °C and 30 °C outcomes, which together exceed 75 % implied probability. Recent model updates have shown little shift in the expected peak, with only modest uncertainty from boundary-layer mixing and urban heat-island effects that could nudge readings by 1 °C. Official station data from the China Meteorological Administration, reported after local sunset, will determine final resolution.
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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