Trader sentiment for Guangzhou's September 18 minimum temperature shows near-even odds between a cool 20°C-or-below outcome and a much warmer 30°C-or-higher result, reflecting genuine short-range forecast uncertainty. Mid-September climatology favors overnight lows near 25°C under typical subtropical high pressure, yet current model spreads arise from variable monsoon moisture, possible weak frontal approaches from the north, and differences in simulated cloud cover that control radiative cooling. Clear, calm nights promote stronger temperature drops toward the lower probabilities, while persistent humidity or light winds support warmer minima. Global and regional ensemble runs through the China Meteorological Administration will provide the next critical updates ahead of 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 18?
30°C or higher 94%
20°C or below 90%
21°C 38%
22°C 38%
20°C or below
90%
21°C
38%
22°C
38%
23°C
38%
24°C
21%
25°C
22%
26°C
22%
27°C
22%
28°C
38%
29°C
38%
30°C or higher
94%
30°C or higher 94%
20°C or below 90%
21°C 38%
22°C 38%
20°C or below
90%
21°C
38%
22°C
38%
23°C
38%
24°C
21%
25°C
22%
26°C
22%
27°C
22%
28°C
38%
29°C
38%
30°C or higher
94%
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 16, 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...Trader sentiment for Guangzhou's September 18 minimum temperature shows near-even odds between a cool 20°C-or-below outcome and a much warmer 30°C-or-higher result, reflecting genuine short-range forecast uncertainty. Mid-September climatology favors overnight lows near 25°C under typical subtropical high pressure, yet current model spreads arise from variable monsoon moisture, possible weak frontal approaches from the north, and differences in simulated cloud cover that control radiative cooling. Clear, calm nights promote stronger temperature drops toward the lower probabilities, while persistent humidity or light winds support warmer minima. Global and regional ensemble runs through the China Meteorological Administration will provide the next critical updates ahead of 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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