Clear to partly cloudy skies and light westerly winds are driving daytime heating toward a peak near 27°C in the Incheon area today, consistent with late-September seasonal norms and the absence of any significant frontal systems or precipitation. Multiple forecast models show highs clustered in the mid-to-upper 20s Celsius, with coastal moderation limiting stronger warming. Recent observational trends and stable high-pressure conditions reinforce this range, while traders assign the bulk of probability to 27°C based on skin-in-the-game assessment of official station data and minimal model spread. Minor shifts in timing of maximum insolation or wind could still allow 26°C or 28°C outcomes.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedHighest temperature in Seoul (Incheon) on September 23?
27°C 70%
26°C 26%
28°C 6%
29°C <1%
$41,256 Vol.
$41,256 Vol.
20°C or below
<1%
21°C
<1%
22°C
<1%
23°C
<1%
24°C
<1%
25°C
<1%
26°C
26%
27°C
70%
28°C
6%
29°C
1%
30°C or higher
<1%
27°C 70%
26°C 26%
28°C 6%
29°C <1%
$41,256 Vol.
$41,256 Vol.
20°C or below
<1%
21°C
<1%
22°C
<1%
23°C
<1%
24°C
<1%
25°C
<1%
26°C
26%
27°C
70%
28°C
6%
29°C
1%
30°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=rksi
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 21, 2026, 12:56 AM ET
Resolution Source
https://www.weather.gov/wrh/timeseries?site=rksiResolver
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=rksi
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=rksiResolver
0x69c47De9D...Clear to partly cloudy skies and light westerly winds are driving daytime heating toward a peak near 27°C in the Incheon area today, consistent with late-September seasonal norms and the absence of any significant frontal systems or precipitation. Multiple forecast models show highs clustered in the mid-to-upper 20s Celsius, with coastal moderation limiting stronger warming. Recent observational trends and stable high-pressure conditions reinforce this range, while traders assign the bulk of probability to 27°C based on skin-in-the-game assessment of official station data and minimal model spread. Minor shifts in timing of maximum insolation or wind could still allow 26°C or 28°C outcomes.
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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