Recent official forecasts from the Korea Meteorological Administration and global models indicate a stable high-pressure system over the Korean Peninsula, with clear to mostly clear skies and light westerly winds expected on September 23, favoring a daily maximum near 27°C in Incheon. This aligns with the market's leading 47.5% implied probability for 27°C and 35% for 26°C, as ensemble guidance clusters in the 26–28°C range—slightly above the late-September climatological average of 24–26°C—while limiting upside risk from stronger warming. Low precipitation chances under 10% and minimal cloud cover further support this consensus, with any minor downward revision possible only if onshore flow strengthens unexpectedly before 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 Seoul (Incheon) on September 23?
27°C 42%
26°C 35%
25°C 22%
24°C 14%
20°C or below
1%
21°C
3%
22°C
8%
23°C
10%
24°C
14%
25°C
22%
26°C
35%
27°C
42%
28°C
10%
29°C
8%
30°C or higher
2%
27°C 42%
26°C 35%
25°C 22%
24°C 14%
20°C or below
1%
21°C
3%
22°C
8%
23°C
10%
24°C
14%
25°C
22%
26°C
35%
27°C
42%
28°C
10%
29°C
8%
30°C or higher
2%
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...Recent official forecasts from the Korea Meteorological Administration and global models indicate a stable high-pressure system over the Korean Peninsula, with clear to mostly clear skies and light westerly winds expected on September 23, favoring a daily maximum near 27°C in Incheon. This aligns with the market's leading 47.5% implied probability for 27°C and 35% for 26°C, as ensemble guidance clusters in the 26–28°C range—slightly above the late-September climatological average of 24–26°C—while limiting upside risk from stronger warming. Low precipitation chances under 10% and minimal cloud cover further support this consensus, with any minor downward revision possible only if onshore flow strengthens unexpectedly before resolution.
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