Official forecasts from sources including the China Meteorological Administration and international models converge on a 27°C overnight low for Shanghai on August 28, driven by persistent easterly flow, high humidity near 85–92%, and scattered light rain suppressing radiative cooling. This aligns with recent daily minima of 26–28°C amid above-average August warmth, with no incoming cold front or clear-sky radiative event to push temperatures lower. Trader consensus at 68.6% for 27°C reflects these stable conditions, while slim odds for 26°C or below hinge on any late-model revisions from updated runs overnight. Historical August averages near 24–25°C provide context, but current steering patterns favor the higher threshold.
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 28?
27°C 51.2%
25°C 5.1%
24°C <1%
23°C or below <1%
$15,531 Vol.
$15,531 Vol.
23°C or below
<1%
24°C
1%
25°C
5%
26°C
37%
27°C
73%
28°C
<1%
29°C
<1%
30°C
<1%
31°C
<1%
32°C
<1%
33°C or higher
<1%
27°C 51.2%
25°C 5.1%
24°C <1%
23°C or below <1%
$15,531 Vol.
$15,531 Vol.
23°C or below
<1%
24°C
1%
25°C
5%
26°C
37%
27°C
73%
28°C
<1%
29°C
<1%
30°C
<1%
31°C
<1%
32°C
<1%
33°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 26, 2026, 12:29 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...Official forecasts from sources including the China Meteorological Administration and international models converge on a 27°C overnight low for Shanghai on August 28, driven by persistent easterly flow, high humidity near 85–92%, and scattered light rain suppressing radiative cooling. This aligns with recent daily minima of 26–28°C amid above-average August warmth, with no incoming cold front or clear-sky radiative event to push temperatures lower. Trader consensus at 68.6% for 27°C reflects these stable conditions, while slim odds for 26°C or below hinge on any late-model revisions from updated runs overnight. Historical August averages near 24–25°C provide context, but current steering patterns favor the higher threshold.
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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