Current numerical weather prediction models, including ECMWF runs, indicate overnight lows near 26–27°C for Guangzhou on September 26 under partly cloudy to clear conditions with light southerly flow and minimal precipitation. This near-even market split between bins at or below 20°C and at or above 30°C reflects uncertainty in the precise minimum amid typical subtropical variability, urban heat island moderation, and potential for slight model divergence on radiative cooling rates. Historical September 26 lows average 23.2°C but have ranged widely; recent stable high-pressure patterns and absence of cold-air advection or typhoon influences currently favor the mid-20s range, with updated forecast guidance expected to refine resolution criteria before the date.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Guangzhou on September 26?
20°C or below 99%
30°C or higher 98%
25°C 40%
21°C 39%
20°C or below
99%
21°C
39%
22°C
39%
23°C
39%
24°C
39%
25°C
40%
26°C
21%
27°C
21%
28°C
39%
29°C
39%
30°C or higher
98%
20°C or below 99%
30°C or higher 98%
25°C 40%
21°C 39%
20°C or below
99%
21°C
39%
22°C
39%
23°C
39%
24°C
39%
25°C
40%
26°C
21%
27°C
21%
28°C
39%
29°C
39%
30°C or higher
98%
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=zggg
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 24, 2026, 12:31 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=zgggResolver
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=zggg
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=zgggResolver
0x69c47de9d...Current numerical weather prediction models, including ECMWF runs, indicate overnight lows near 26–27°C for Guangzhou on September 26 under partly cloudy to clear conditions with light southerly flow and minimal precipitation. This near-even market split between bins at or below 20°C and at or above 30°C reflects uncertainty in the precise minimum amid typical subtropical variability, urban heat island moderation, and potential for slight model divergence on radiative cooling rates. Historical September 26 lows average 23.2°C but have ranged widely; recent stable high-pressure patterns and absence of cold-air advection or typhoon influences currently favor the mid-20s range, with updated forecast guidance expected to refine resolution criteria before the date.
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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