The Prediction Markets

Highest temperature in Seoul on April 21?

Closed
Apr 21, 2026
Traded
$572K
Venues
Polymarket
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This market has closed

Trading ended on Apr 21, 2026. The prices below are the last ones before it closed and no longer update. Browse open markets

Odds by venue

Fair chance strips out each venue’s built-in margin (its prices add up to more than 100%), then blends the venues by how much has traded there, so the outcomes add up to 100%. Best Yes price is the cheapest ask across venues, and the payout is what a winning $100 stake returns before fees. Open a row for each venue’s contract name, bid and ask, and how closely their rules match.

Prices come from our regular polls of each venue, the oldest 185 days ago. Ages are as of when this page was built.

  • Polymarket
14°C
99.8%
Polymarket 100%polled, 4443 h ago
Polymarket
Contract
14°C
Last price
100%
As of
Polled 185 d ago
Buy Yes
—
Sell Yes
99.9¢
Volume
$119K
Trade this on Polymarket
15°C
0.1%
Polymarket 0.1%polled, 4443 h agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
15°C
Last price
0.1%
As of
Polled 185 d ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$41K
Trade this on Polymarket
16°C
0.1%
Polymarket 0.1%polled, 4443 h agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
16°C
Last price
0.1%
As of
Polled 185 d ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$38K
Trade this on Polymarket
17°C
0%
Polymarket 0.1%polled, 4443 h agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
17°C
Last price
0.1%
As of
Polled 185 d ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$48K
Trade this on Polymarket
18°C or higher
0%
Polymarket 0.1%polled, 4443 h agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
18°C or higher
Last price
0.1%
As of
Polled 185 d ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$99K
Trade this on Polymarket

Who resolves this market

Polymarket
Polymarket resolves via:
UMA optimistic oracle, source: wunderground.com

How the odds have moved

The top 3 outcomes on both venues, with the consensus between them. Hover for exact values.

  • 14°C
  • 15°C
  • 16°C

About this market

Final prediction market prices for "Highest temperature in Seoul on April 21?". 14°C last traded at 99.8%. Next is 15°C at 0.1%. $572K has traded across 5 outcomes on Polymarket. The market closed on Apr 21, 2026.

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 Apr '26. 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.

Questions

What does the consensus price mean?

It is the price of a Yes contract that pays $1 if the outcome happens. A 14¢ price means traders put the chance near 14%. Where two venues list the same outcome, we blend their last prices, weighting the venue with more trading volume more heavily (neither counts for less than a quarter). When only one outcome can win, each venue’s prices add up to a little over 100% (its margin); the fair chance removes that margin so the outcomes add up to exactly 100%.

How is the payout worked out?

A Yes contract pays $1 if it wins, so at the best ask a $100 stake buys 100 ÷ ask contracts. At 18¢ that is about 555 contracts, paying $556 (5.56x) if Yes happens. Venue fees and price slippage on larger orders are not included.

Why do the venues show different prices?

Each venue has its own traders, fees and order book. Contracts can also settle on slightly different terms, which is why each row lists how closely the rules match.

Is a price gap an arbitrage?

Only when you can buy Yes on one venue below what someone pays for Yes on the other, after fees, and both contracts settle the same way. We show the executable bid and ask so you can check.

How fresh are these prices?

Venue prices refresh every few minutes, and the order book and live quotes stream continuously. Each venue’s card shows when we last observed it.

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