Official temperature observations from the Korea Meteorological Administration and Incheon International Airport station confirm a daytime maximum of exactly 27°C in Seoul on May 31, 2026, under mostly clear skies, light southwesterly flow, and minimal cloud cover that limited overnight radiative cooling while allowing strong daytime heating. Late-May climatology in the region typically produces highs near 25°C, so this outcome reflects slightly above-average warmth consistent with ensemble model runs showing 26–28°C. Market-implied odds at 100% on 27°C align with the verified record, though minor station calibration adjustments or data revisions remain theoretically possible before final settlement.
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 on May 31?
Highest temperature in Seoul on May 31?
27°C 100.0%
18°C or below <1%
19°C <1%
20°C <1%
$419,183 Vol.
$419,183 Vol.
May 31, 2026
18°C or below
No
19°C
No
20°C
No
21°C
No
22°C
No
23°C
No
24°C
No
25°C
No
26°C
No
27°C
Yes
28°C or higher
No
27°C 100.0%
18°C or below <1%
19°C <1%
20°C <1%
$419,183 Vol.
$419,183 Vol.
May 31, 2026
18°C or below
$3,537 Vol.
No
19°C
$15,096 Vol.
No
20°C
$2,528 Vol.
No
21°C
$6,635 Vol.
No
22°C
$29,949 Vol.
No
23°C
$12,735 Vol.
No
24°C
$21,614 Vol.
No
25°C
$24,986 Vol.
No
26°C
$22,347 Vol.
No
27°C
$162,117 Vol.
Yes
28°C or higher
$117,639 Vol.
No
This market will resolve to the temperature range that contains the highest temperature recorded at the Incheon Intl Airport Station in degrees Celsius on 31 May '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.Official temperature observations from the Korea Meteorological Administration and Incheon International Airport station confirm a daytime maximum of exactly 27°C in Seoul on May 31, 2026, under mostly clear skies, light southwesterly flow, and minimal cloud cover that limited overnight radiative cooling while allowing strong daytime heating. Late-May climatology in the region typically produces highs near 25°C, so this outcome reflects slightly above-average warmth consistent with ensemble model runs showing 26–28°C. Market-implied odds at 100% on 27°C align with the verified record, though minor station calibration adjustments or data revisions remain theoretically possible before final settlement.
This market will resolve to the temperature range that contains the highest temperature recorded at the Incheon Intl Airport Station in degrees Celsius on 31 May '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.
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: May 29, 2026, 12:06 AM ET
Volume
$419,183End Date
May 31, 2026Market Opened
May 29, 2026, 12:06 AM ETResolution Source
https://www.wunderground.com/history/daily/kr/incheon/RKSIResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
This market will resolve to the temperature range that contains the highest temperature recorded at the Incheon Intl Airport Station in degrees Celsius on 31 May '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.Official temperature observations from the Korea Meteorological Administration and Incheon International Airport station confirm a daytime maximum of exactly 27°C in Seoul on May 31, 2026, under mostly clear skies, light southwesterly flow, and minimal cloud cover that limited overnight radiative cooling while allowing strong daytime heating. Late-May climatology in the region typically produces highs near 25°C, so this outcome reflects slightly above-average warmth consistent with ensemble model runs showing 26–28°C. Market-implied odds at 100% on 27°C align with the verified record, though minor station calibration adjustments or data revisions remain theoretically possible before final settlement.
This market will resolve to the temperature range that contains the highest temperature recorded at the Incheon Intl Airport Station in degrees Celsius on 31 May '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.
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
$419,183End Date
May 31, 2026Market Opened
May 29, 2026, 12:06 AM ETResolution Source
https://www.wunderground.com/history/daily/kr/incheon/RKSIResolver
0x69c47De9D...Outcome proposed: No
No dispute
Final outcome: No
Official temperature observations from the Korea Meteorological Administration and Incheon International Airport station confirm a daytime maximum of exactly 27°C in Seoul on May 31, 2026, under mostly clear skies, light southwesterly flow, and minimal cloud cover that limited overnight radiative cooling while allowing strong daytime heating. Late-May climatology in the region typically produces highs near 25°C, so this outcome reflects slightly above-average warmth consistent with ensemble model runs showing 26–28°C. Market-implied odds at 100% on 27°C align with the verified record, though minor station calibration adjustments or data revisions remain theoretically possible before final settlement.
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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