**Current forecast models point to overnight lows near 25–27°C in Guangzhou on September 22 amid persistent thunderstorm activity and high humidity, driving the closely matched market-implied odds between cooler (≤21°C at 47.5%) and warmer (≥31°C at 47.5%) outcomes.** Trader consensus reflects uncertainty in the precise minimum, as variable cloud cover and scattered rain can sharply limit nocturnal radiative cooling in this subtropical monsoon climate, while clearer intervals or lighter winds could allow greater temperature drops. Recent days have featured highs in the low-to-mid 30s°C with dew points near 25°C, maintaining elevated nighttime readings consistent with September climatology. Upcoming model runs and local observations will clarify whether steering patterns sustain the moisture or permit more cooling.
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 22?
21°C or below 95%
31°C or higher 95%
23°C 38%
24°C 38%
21°C or below
95%
22°C
13%
23°C
38%
24°C
38%
25°C
38%
26°C
22%
27°C
22%
28°C
38%
29°C
16%
30°C
16%
31°C or higher
95%
21°C or below 95%
31°C or higher 95%
23°C 38%
24°C 38%
21°C or below
95%
22°C
13%
23°C
38%
24°C
38%
25°C
38%
26°C
22%
27°C
22%
28°C
38%
29°C
16%
30°C
16%
31°C or higher
95%
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 20, 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 forecast models point to overnight lows near 25–27°C in Guangzhou on September 22 amid persistent thunderstorm activity and high humidity, driving the closely matched market-implied odds between cooler (≤21°C at 47.5%) and warmer (≥31°C at 47.5%) outcomes.** Trader consensus reflects uncertainty in the precise minimum, as variable cloud cover and scattered rain can sharply limit nocturnal radiative cooling in this subtropical monsoon climate, while clearer intervals or lighter winds could allow greater temperature drops. Recent days have featured highs in the low-to-mid 30s°C with dew points near 25°C, maintaining elevated nighttime readings consistent with September climatology. Upcoming model runs and local observations will clarify whether steering patterns sustain the moisture or permit more cooling.
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