Recent forecast models from sources like the Guangdong Meteorological Bureau and international ensembles indicate a partly cloudy day on September 17 with limited precipitation, supporting daytime highs near 32–34°C under a warm, humid subtropical air mass typical of late-summer conditions in the Pearl River Delta. This aligns with the climatological average high of 31.8°C for the date while allowing modest warming from solar insolation amid light southerly winds. Historical records show 35.6°C as the September 17 maximum, but current steering patterns and moisture levels reduce the likelihood of extreme outliers. Traders appear to weigh these near-term model runs heavily, with implied probabilities favoring 34°C as the most probable outcome ahead of final observational data from local stations.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Guangzhou on September 17?
34°C 47%
35°C 22%
33°C 18%
32°C 5%
$15,433 Vol.
$15,433 Vol.
27°C or below
<1%
28°C
<1%
29°C
<1%
30°C
1%
31°C
3%
32°C
5%
33°C
18%
34°C
47%
35°C
22%
36°C
5%
37°C or higher
<1%
34°C 47%
35°C 22%
33°C 18%
32°C 5%
$15,433 Vol.
$15,433 Vol.
27°C or below
<1%
28°C
<1%
29°C
<1%
30°C
1%
31°C
3%
32°C
5%
33°C
18%
34°C
47%
35°C
22%
36°C
5%
37°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=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 15, 2026, 12:58 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 highest 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...Recent forecast models from sources like the Guangdong Meteorological Bureau and international ensembles indicate a partly cloudy day on September 17 with limited precipitation, supporting daytime highs near 32–34°C under a warm, humid subtropical air mass typical of late-summer conditions in the Pearl River Delta. This aligns with the climatological average high of 31.8°C for the date while allowing modest warming from solar insolation amid light southerly winds. Historical records show 35.6°C as the September 17 maximum, but current steering patterns and moisture levels reduce the likelihood of extreme outliers. Traders appear to weigh these near-term model runs heavily, with implied probabilities favoring 34°C as the most probable outcome ahead of final observational data from local stations.
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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