Forecast models for Chengdu on September 17 indicate persistent cloud cover and scattered showers, limiting surface heating and keeping the daily maximum in the mid-20s Celsius. High humidity and light variable winds reduce evaporative cooling and vertical mixing, while the Sichuan basin's topography traps moisture and moderates extremes. These conditions align with late-summer transition patterns, where September averages near 25°C but rain suppresses peaks below clearer-sky potential. Trader consensus favoring 26°C or 27°C as the highest temperature reflects this balance, with lower odds on 28°C or above tied to uncertainty over shower timing and any late-day clearing that could allow brief additional warming. Updated numerical weather predictions from agencies like the China Meteorological Administration will refine these probabilities ahead of market resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Chengdu on September 17?
26°C 32%
27°C 28%
28°C 19%
25°C 16%
$12,576 Vol.
$12,576 Vol.
21°C or below
<1%
22°C
2%
23°C
3%
24°C
7%
25°C
16%
26°C
32%
27°C
28%
28°C
19%
29°C
3%
30°C
<1%
31°C or higher
<1%
26°C 32%
27°C 28%
28°C 19%
25°C 16%
$12,576 Vol.
$12,576 Vol.
21°C or below
<1%
22°C
2%
23°C
3%
24°C
7%
25°C
16%
26°C
32%
27°C
28%
28°C
19%
29°C
3%
30°C
<1%
31°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=zuuu
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, 12:57 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=zuuuResolver
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=zuuu
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=zuuuResolver
0x69c47De9D...Forecast models for Chengdu on September 17 indicate persistent cloud cover and scattered showers, limiting surface heating and keeping the daily maximum in the mid-20s Celsius. High humidity and light variable winds reduce evaporative cooling and vertical mixing, while the Sichuan basin's topography traps moisture and moderates extremes. These conditions align with late-summer transition patterns, where September averages near 25°C but rain suppresses peaks below clearer-sky potential. Trader consensus favoring 26°C or 27°C as the highest temperature reflects this balance, with lower odds on 28°C or above tied to uncertainty over shower timing and any late-day clearing that could allow brief additional warming. Updated numerical weather predictions from agencies like the China Meteorological Administration will refine these probabilities ahead of market resolution.
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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