Highest temperature in Seoul on May 28?

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Market context

The highest temperature recorded at Incheon International Airport on 28 May 2026 will determine the resolution bracket for this market. Seoul's late May weather typically transitions into early summer conditions, with mean daily highs around 26–27°C and occasional warm spells pushing into the low 30s.

Historical data from Incheon Airport shows considerable year-to-year variation for this date. Between 2015 and 2024, recorded highs on 28 May ranged from 19°C to 32°C, with roughly half of those years falling between 24–28°C. The 0% crowd probability suggests traders are either awaiting updated seasonal forecasts or treating this as a placeholder pending closer-range meteorological models. Late May in Seoul sits at the boundary between spring and summer weather patterns, making prediction difficult more than a month in advance.

The Korea Meteorological Administration typically issues extended forecasts around early May, which will provide the first reliable guidance on atmospheric pressure systems and potential heat waves affecting the peninsula during that week. Sea surface temperatures in the Yellow Sea and any developing high-pressure systems over East Asia will be critical factors. Traders should monitor whether any tropical systems form in the western Pacific during May, as these can alter Seoul's weather patterns substantially. The settlement window closes at midday UTC on 28 May, allowing only morning observations from Incheon Airport to count toward resolution.

Methodology

This page reviews Highest temperature in Seoul on May 28? 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 Sport 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

Is this market available outside the US?

Sport Prediction is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 Sport Prediction?

Zero. Sport 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, Sport Prediction triggers a quick verification flow that finishes in minutes.