Highest temperature in Seoul on June 20?

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Active sub-markets

Market context

Seoul’s late-June daytime heat is usually warm but not extreme, with average daily highs in June rising from about 77°F to 81°F and only rarely exceeding 87°F, so the market’s threshold still depends on a proper hot spell rather than routine summer warmth.[2] Weather Underground’s own historical context also shows that the city’s June records can move sharply when a heat wave arrives: Seoul’s highest June daily average cited by the Korea Times was 29.4°C, set on 20 June last year.[1]

The current 2% implied probability fits a low-frequency outcome for a single-day temperature extreme, especially with settlement tied to the highest reading at Incheon Intl Airport Station rather than central Seoul. For traders, the key catalysts are any short-term KMA heat advisories, the position of the East Asian monsoon front, and whether cloud cover or rain arrives early enough to cap the afternoon maximum; a clear, dry pre-monsoon day would matter far more than overnight warmth. The resolution source is Weather Underground’s daily history page for Incheon, so the market will be driven by the airport station’s peak observation rather than citywide averages or forecasts.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Seoul on June 20? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Champions League Prediction — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

What does it cost to trade on Champions League Prediction?

Zero. Champions League Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Champions League Prediction triggers a quick verification flow that finishes in minutes.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.