**Forecast models from sources like GFS and ECMWF place Zhengzhou's minimum temperature for September 21 near 19–20°C, driving the near-even split in market-implied odds.** Stable high pressure, light northerly winds under 5 km/h, and partly to mostly cloudy skies are limiting nocturnal radiative cooling and keeping dew points elevated around 19–20°C. This setup aligns with recent observational trends showing overnight lows holding in the upper teens amid above-average humidity. Historical September averages near 17°C provide context, but the current pattern favors a milder outcome. Final resolution will hinge on the precise timing of the daily minimum at official stations, with any late-night clearing potentially allowing a dip toward 18°C.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Zhengzhou on September 21?
Lowest temperature in Zhengzhou on September 21?
15°C or below 90%
17°C 17%
18°C 3%
16°C <1%
$844 Vol.
$844 Vol.
Sep 21, 2026
15°C or below
90%
16°C
1%
17°C
17%
18°C
16%
19°C
47%
20°C
50%
21°C
<1%
22°C
<1%
23°C
<1%
24°C
<1%
25°C or higher
<1%
15°C or below 90%
17°C 17%
18°C 3%
16°C <1%
$844 Vol.
$844 Vol.
Sep 21, 2026
15°C or below
$10 Vol.
90%
16°C
$65 Vol.
1%
17°C
$58 Vol.
17%
18°C
$41 Vol.
16%
19°C
$11 Vol.
47%
20°C
$71 Vol.
50%
21°C
$306 Vol.
<1%
22°C
$162 Vol.
<1%
23°C
$41 Vol.
<1%
24°C
$37 Vol.
<1%
25°C or higher
$41 Vol.
<1%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Zhengzhou Xinzheng International Airport Station in degrees Celsius on 21 Sep '26.
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=zhcc
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.**Forecast models from sources like GFS and ECMWF place Zhengzhou's minimum temperature for September 21 near 19–20°C, driving the near-even split in market-implied odds.** Stable high pressure, light northerly winds under 5 km/h, and partly to mostly cloudy skies are limiting nocturnal radiative cooling and keeping dew points elevated around 19–20°C. This setup aligns with recent observational trends showing overnight lows holding in the upper teens amid above-average humidity. Historical September averages near 17°C provide context, but the current pattern favors a milder outcome. Final resolution will hinge on the precise timing of the daily minimum at official stations, with any late-night clearing potentially allowing a dip toward 18°C.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Zhengzhou Xinzheng International Airport Station in degrees Celsius on 21 Sep '26.
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=zhcc
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.
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=zhcc
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 20, 2026, 12:28 AM ET
Volume
$844End Date
Sep 21, 2026Market Opened
Sep 20, 2026, 12:28 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=zhccResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Zhengzhou Xinzheng International Airport Station in degrees Celsius on 21 Sep '26.
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=zhcc
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.**Forecast models from sources like GFS and ECMWF place Zhengzhou's minimum temperature for September 21 near 19–20°C, driving the near-even split in market-implied odds.** Stable high pressure, light northerly winds under 5 km/h, and partly to mostly cloudy skies are limiting nocturnal radiative cooling and keeping dew points elevated around 19–20°C. This setup aligns with recent observational trends showing overnight lows holding in the upper teens amid above-average humidity. Historical September averages near 17°C provide context, but the current pattern favors a milder outcome. Final resolution will hinge on the precise timing of the daily minimum at official stations, with any late-night clearing potentially allowing a dip toward 18°C.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Zhengzhou Xinzheng International Airport Station in degrees Celsius on 21 Sep '26.
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=zhcc
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.
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=zhcc
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.
Volume
$844End Date
Sep 21, 2026Market Opened
Sep 20, 2026, 12:28 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=zhccResolver
0x69c47De9D...**Forecast models from sources like GFS and ECMWF place Zhengzhou's minimum temperature for September 21 near 19–20°C, driving the near-even split in market-implied odds.** Stable high pressure, light northerly winds under 5 km/h, and partly to mostly cloudy skies are limiting nocturnal radiative cooling and keeping dew points elevated around 19–20°C. This setup aligns with recent observational trends showing overnight lows holding in the upper teens amid above-average humidity. Historical September averages near 17°C provide context, but the current pattern favors a milder outcome. Final resolution will hinge on the precise timing of the daily minimum at official stations, with any late-night clearing potentially allowing a dip toward 18°C.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · Updated
Beware of external links.
Beware of external links.
Frequently Asked Questions