**Strong model consensus and official forecasts from the Korea Meteorological Administration projecting a minimum of 19°C under clear skies and light northerly winds have driven the 98% market-implied probability for that outcome.** Recent observations at Incheon International Airport show overnight temperatures falling to around 19–20°C early on September 20, consistent with seasonal norms for late September in the region, where average daily lows hover near 18°C amid transitioning autumn conditions. High pressure and minimal cloud cover have suppressed radiative cooling variability, reinforcing trader confidence. Minor deviations to 18°C or 20°C remain possible if localized wind shifts or urban heat island effects at the exact measurement site alter readings slightly, though current data releases show little room for such shifts before resolution.
Experimental AI-generated summary referencing Polymarket data. This is not trading advice and plays no role in how this market resolves. · UpdatedLowest temperature in Seoul (Incheon) on September 20?
Lowest temperature in Seoul (Incheon) on September 20?
19°C 98%
18°C 2%
17°C <1%
12°C or below <1%
NEW
NEW
Sep 20, 2026
12°C or below
<1%
13°C
<1%
14°C
<1%
15°C
<1%
16°C
<1%
17°C
<1%
18°C
2%
19°C
98%
20°C
<1%
21°C
<1%
22°C or higher
<1%
19°C 98%
18°C 2%
17°C <1%
12°C or below <1%
NEW
NEW
Sep 20, 2026
12°C or below
$41 Vol.
<1%
13°C
$61 Vol.
<1%
14°C
$238 Vol.
<1%
15°C
$31 Vol.
<1%
16°C
$31 Vol.
<1%
17°C
$503 Vol.
<1%
18°C
$3,649 Vol.
2%
19°C
$2,274 Vol.
98%
20°C
$1,437 Vol.
<1%
21°C
$59 Vol.
<1%
22°C or higher
$41 Vol.
<1%
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Incheon Intl Airport Station in degrees Celsius on 20 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=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.**Strong model consensus and official forecasts from the Korea Meteorological Administration projecting a minimum of 19°C under clear skies and light northerly winds have driven the 98% market-implied probability for that outcome.**
Recent observations at Incheon International Airport show overnight temperatures falling to around 19–20°C early on September 20, consistent with seasonal norms for late September in the region, where average daily lows hover near 18°C amid transitioning autumn conditions. High pressure and minimal cloud cover have suppressed radiative cooling variability, reinforcing trader confidence. Minor deviations to 18°C or 20°C remain possible if localized wind shifts or urban heat island effects at the exact measurement site alter readings slightly, though current data releases show little room for such shifts before resolution.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Incheon Intl Airport Station in degrees Celsius on 20 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=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.
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=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 18, 2026, 12:29 AM ET
Volume
$8,366End Date
Sep 20, 2026Market Opened
Sep 18, 2026, 12:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=rksiResolver
0x69c47De9D...This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Incheon Intl Airport Station in degrees Celsius on 20 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=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.**Strong model consensus and official forecasts from the Korea Meteorological Administration projecting a minimum of 19°C under clear skies and light northerly winds have driven the 98% market-implied probability for that outcome.**
Recent observations at Incheon International Airport show overnight temperatures falling to around 19–20°C early on September 20, consistent with seasonal norms for late September in the region, where average daily lows hover near 18°C amid transitioning autumn conditions. High pressure and minimal cloud cover have suppressed radiative cooling variability, reinforcing trader confidence. Minor deviations to 18°C or 20°C remain possible if localized wind shifts or urban heat island effects at the exact measurement site alter readings slightly, though current data releases show little room for such shifts before resolution.
This market will resolve to the temperature range that contains the lowest temperature recorded by NOAA at the Incheon Intl Airport Station in degrees Celsius on 20 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=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.
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=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.
Volume
$8,366End Date
Sep 20, 2026Market Opened
Sep 18, 2026, 12:29 AM ETResolution Source
https://www.weather.gov/wrh/timeseries?site=rksiResolver
0x69c47De9D...**Strong model consensus and official forecasts from the Korea Meteorological Administration projecting a minimum of 19°C under clear skies and light northerly winds have driven the 98% market-implied probability for that outcome.** Recent observations at Incheon International Airport show overnight temperatures falling to around 19–20°C early on September 20, consistent with seasonal norms for late September in the region, where average daily lows hover near 18°C amid transitioning autumn conditions. High pressure and minimal cloud cover have suppressed radiative cooling variability, reinforcing trader confidence. Minor deviations to 18°C or 20°C remain possible if localized wind shifts or urban heat island effects at the exact measurement site alter readings slightly, though current data releases show little room for such shifts before 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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