**Persistent cloud cover, widespread rain, and high humidity from the North Pacific high-pressure system's edge are suppressing daytime heating in the Seoul-Incheon region today, August 21, 2026, keeping maximum temperatures in the narrow 26–27°C range.** Official forecasts from the Korea Meteorological Administration (KMA) and international models (Met Office, NOAA-influenced guidance) consistently project highs near 26–27°C under overcast skies with 80–100% chance of rain or thunderstorms, dew points around 23–24°C, and light easterly winds. These conditions limit solar insolation and enhance evaporative cooling compared to the clearer, hotter days earlier in the week (when highs reached 30–32°C). Historical August baselines for Incheon average 29–31°C, but the current synoptic setup favors the lower end. Market-implied odds (51.5% for 27°C, 40.5% for 26°C) reflect trader consensus on these verified forecast runs, with slim tails for 28°C+ only if rain clears earlier than expected. No major model shifts have occurred in the past 24 hours, and resolution hinges on official Incheon observations for the calendar day's peak.
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 August 21?
Highest temperature in Seoul (Incheon) on August 21?
27°C 51%
26°C 32%
28°C 10%
29°C 1.5%
NEW
$69,665 Vol.
NEW
$69,665 Vol.
Aug 21, 2026
23°C or below
<1%
24°C
<1%
25°C
<1%
26°C
32%
27°C
54%
28°C
10%
29°C
2%
30°C
1%
31°C
<1%
32°C
<1%
33°C or higher
<1%
27°C 51%
26°C 32%
28°C 10%
29°C 1.5%
NEW
$69,665 Vol.
NEW
$69,665 Vol.
Aug 21, 2026
23°C or below
$408 Vol.
<1%
24°C
$1,011 Vol.
<1%
25°C
$3,499 Vol.
<1%
26°C
$15,433 Vol.
32%
27°C
$9,900 Vol.
54%
28°C
$5,927 Vol.
10%
29°C
$7,935 Vol.
2%
30°C
$15,480 Vol.
1%
31°C
$3,732 Vol.
<1%
32°C
$3,307 Vol.
<1%
33°C or higher
$3,033 Vol.
<1%
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Incheon Intl Airport Station in degrees Celsius on 21 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Incheon Intl Airport Station, available here: https://www.wunderground.com/history/daily/kr/incheon/RKSI.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.**Persistent cloud cover, widespread rain, and high humidity from the North Pacific high-pressure system's edge are suppressing daytime heating in the Seoul-Incheon region today, August 21, 2026, keeping maximum temperatures in the narrow 26–27°C range.**
Official forecasts from the Korea Meteorological Administration (KMA) and international models (Met Office, NOAA-influenced guidance) consistently project highs near 26–27°C under overcast skies with 80–100% chance of rain or thunderstorms, dew points around 23–24°C, and light easterly winds. These conditions limit solar insolation and enhance evaporative cooling compared to the clearer, hotter days earlier in the week (when highs reached 30–32°C).
Historical August baselines for Incheon average 29–31°C, but the current synoptic setup favors the lower end. Market-implied odds (51.5% for 27°C, 40.5% for 26°C) reflect trader consensus on these verified forecast runs, with slim tails for 28°C+ only if rain clears earlier than expected. No major model shifts have occurred in the past 24 hours, and resolution hinges on official Incheon observations for the calendar day's peak.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Incheon Intl Airport Station in degrees Celsius on 21 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Incheon Intl Airport Station, available here: https://www.wunderground.com/history/daily/kr/incheon/RKSI.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Incheon Intl Airport Station in degrees Celsius on 21 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Incheon Intl Airport Station, available here: https://www.wunderground.com/history/daily/kr/incheon/RKSI.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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: Aug 19, 2026, 12:56 AM ET
Volume
$69,665End Date
Aug 21, 2026Market Opened
Aug 19, 2026, 12:56 AM ETResolution Source
https://www.wunderground.com/history/daily/kr/incheon/RKSIResolver
0x69c47De9D...This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Incheon Intl Airport Station in degrees Celsius on 21 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Incheon Intl Airport Station, available here: https://www.wunderground.com/history/daily/kr/incheon/RKSI.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.**Persistent cloud cover, widespread rain, and high humidity from the North Pacific high-pressure system's edge are suppressing daytime heating in the Seoul-Incheon region today, August 21, 2026, keeping maximum temperatures in the narrow 26–27°C range.**
Official forecasts from the Korea Meteorological Administration (KMA) and international models (Met Office, NOAA-influenced guidance) consistently project highs near 26–27°C under overcast skies with 80–100% chance of rain or thunderstorms, dew points around 23–24°C, and light easterly winds. These conditions limit solar insolation and enhance evaporative cooling compared to the clearer, hotter days earlier in the week (when highs reached 30–32°C).
Historical August baselines for Incheon average 29–31°C, but the current synoptic setup favors the lower end. Market-implied odds (51.5% for 27°C, 40.5% for 26°C) reflect trader consensus on these verified forecast runs, with slim tails for 28°C+ only if rain clears earlier than expected. No major model shifts have occurred in the past 24 hours, and resolution hinges on official Incheon observations for the calendar day's peak.
This market will resolve based on the highest temperature recorded in the 'Daily Observations' table on Weather Underground, not the figure displayed in the 'Day High & Low' summary section; in the event of any discrepancy between the two, the Daily Observations table shall be the primary resolution source not the Day High & Low section.
This market will resolve to the temperature range that contains the highest temperature recorded at the Incheon Intl Airport Station in degrees Celsius on 21 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Incheon Intl Airport Station, available here: https://www.wunderground.com/history/daily/kr/incheon/RKSI.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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.
This market will resolve to the temperature range that contains the highest temperature recorded at the Incheon Intl Airport Station in degrees Celsius on 21 Aug '26.
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day for the Incheon Intl Airport Station, available here: https://www.wunderground.com/history/daily/kr/incheon/RKSI.
To toggle between Fahrenheit and Celsius, click the gear icon next to the search bar and switch the Temperature setting between °F and °C.
This market can not resolve until the first data point for the following date has been published on the resolution source.
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
$69,665End Date
Aug 21, 2026Market Opened
Aug 19, 2026, 12:56 AM ETResolution Source
https://www.wunderground.com/history/daily/kr/incheon/RKSIResolver
0x69c47De9D...**Persistent cloud cover, widespread rain, and high humidity from the North Pacific high-pressure system's edge are suppressing daytime heating in the Seoul-Incheon region today, August 21, 2026, keeping maximum temperatures in the narrow 26–27°C range.** Official forecasts from the Korea Meteorological Administration (KMA) and international models (Met Office, NOAA-influenced guidance) consistently project highs near 26–27°C under overcast skies with 80–100% chance of rain or thunderstorms, dew points around 23–24°C, and light easterly winds. These conditions limit solar insolation and enhance evaporative cooling compared to the clearer, hotter days earlier in the week (when highs reached 30–32°C). Historical August baselines for Incheon average 29–31°C, but the current synoptic setup favors the lower end. Market-implied odds (51.5% for 27°C, 40.5% for 26°C) reflect trader consensus on these verified forecast runs, with slim tails for 28°C+ only if rain clears earlier than expected. No major model shifts have occurred in the past 24 hours, and resolution hinges on official Incheon observations for the calendar day's peak.
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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