Recent observational data and short-range model consensus from agencies tracking Shanghai’s urban heat island and regional moisture transport indicate the overnight minimum on August 29 will settle at 27 °C. Persistent high humidity above 75 %, widespread cloud cover limiting radiational cooling, and light easterly flow have kept surface temperatures from dropping further overnight, consistent with late-August climatology where daily lows rarely fall below 26 °C. With the 24-hour period nearing completion and no new synoptic features expected to alter the boundary layer before midnight, market-implied odds reflect this near-certainty. A sudden clearing of skies or revised station readings could still shift the recorded low, but current conditions make such outcomes unlikely.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Shanghai on August 29?
27°C 98.4%
26°C 6%
25°C <1%
22°C or below <1%
$7,427 Vol.
$7,427 Vol.
22°C or below
<1%
23°C
<1%
24°C
<1%
25°C
1%
26°C
6%
27°C
98%
28°C
<1%
29°C
<1%
30°C
<1%
31°C
<1%
32°C or higher
<1%
27°C 98.4%
26°C 6%
25°C <1%
22°C or below <1%
$7,427 Vol.
$7,427 Vol.
22°C or below
<1%
23°C
<1%
24°C
<1%
25°C
1%
26°C
6%
27°C
98%
28°C
<1%
29°C
<1%
30°C
<1%
31°C
<1%
32°C or higher
<1%
The resolution source for this market will be information from NOAA, specifically the lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=zspd
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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: Aug 27, 2026, 12:30 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 lowest reading under the "Temp" column for all times on this day, available here: https://www.weather.gov/wrh/timeseries?site=zspd
If NOAA data is unavailable or missing for the observation period, Weather Underground will be used as the secondary resolution source.
To toggle between Fahrenheit and Celsius, click the "Switch to Metric Units" button until the relevant table displays °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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 observational data and short-range model consensus from agencies tracking Shanghai’s urban heat island and regional moisture transport indicate the overnight minimum on August 29 will settle at 27 °C. Persistent high humidity above 75 %, widespread cloud cover limiting radiational cooling, and light easterly flow have kept surface temperatures from dropping further overnight, consistent with late-August climatology where daily lows rarely fall below 26 °C. With the 24-hour period nearing completion and no new synoptic features expected to alter the boundary layer before midnight, market-implied odds reflect this near-certainty. A sudden clearing of skies or revised station readings could still shift the recorded low, but current conditions make such outcomes unlikely.
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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