Latest ensemble forecasts from the Korea Meteorological Administration and ECMWF models drive the neck-and-neck trader odds for Seoul's March 20 high temperature, with 10°C edging ahead at 21.5% implied probability amid a projected peak of 9-11°C under persistent cold air advection from Siberia. Differentiating factors include model spreads of ±1-2°C: GFS runs favor 10-11°C with clearer skies enhancing diurnal heating, while ECMWF ensembles lean cooler at 9°C due to potential low-level clouds and northerly winds. Historical March norms average 11°C, but this year's amplified jet stream wavering introduces uncertainty, capping 12°C+ odds below 20% as traders weigh incoming forecast updates.
Experimental AI-generated summary referencing Polymarket data · UpdatedHighest temperature in Seoul on March 20?
Highest temperature in Seoul on March 20?
12°C 26%
9°C 19%
11°C 18%
10°C 17%
$15,362 Vol.
$15,362 Vol.
5°C or below
<1%
6°C
2%
7°C
2%
8°C
6%
9°C
19%
10°C
19%
11°C
17%
12°C
24%
13°C
9%
14°C
3%
15°C or higher
1%
12°C 26%
9°C 19%
11°C 18%
10°C 17%
$15,362 Vol.
$15,362 Vol.
5°C or below
<1%
6°C
2%
7°C
2%
8°C
6%
9°C
19%
10°C
19%
11°C
17%
12°C
24%
13°C
9%
14°C
3%
15°C or higher
1%
The resolution source for this market will be information from Wunderground, specifically the highest temperature recorded for all times on this day by the Forecast for the Incheon Intl Airport Station once information is finalized, 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 to "Yes" until all data for this date has been finalized.
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.
Any revisions to temperatures recorded after data is finalized for this market's timeframe will not be considered for this market's resolution.
Market Opened: Mar 16, 2026, 6:01 AM ET
Resolution Source
https://www.wunderground.com/history/daily/kr/incheon/RKSIResolver
0x69c47De9D...Resolution Source
https://www.wunderground.com/history/daily/kr/incheon/RKSIResolver
0x69c47De9D...Latest ensemble forecasts from the Korea Meteorological Administration and ECMWF models drive the neck-and-neck trader odds for Seoul's March 20 high temperature, with 10°C edging ahead at 21.5% implied probability amid a projected peak of 9-11°C under persistent cold air advection from Siberia. Differentiating factors include model spreads of ±1-2°C: GFS runs favor 10-11°C with clearer skies enhancing diurnal heating, while ECMWF ensembles lean cooler at 9°C due to potential low-level clouds and northerly winds. Historical March norms average 11°C, but this year's amplified jet stream wavering introduces uncertainty, capping 12°C+ odds below 20% as traders weigh incoming forecast updates.
Experimental AI-generated summary referencing Polymarket data · Updated
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