Highest temperature in Seoul on May 28?

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Market context

Seoul's maximum temperature on 28 May 2026 will be measured at Incheon International Airport Station and resolved against historical Weather Underground data. The settlement window closes at midday UTC, meaning traders must lock positions before the final afternoon hours when peak temperatures typically occur in late May. For programmatic traders, this creates a timing constraint: automated feeds pulling from Weather Underground's history endpoint will only reflect confirmed readings after the official observation period closes, requiring either manual verification or delayed settlement confirmation.

Historical May temperatures in Seoul cluster between 24–28°C as daily highs, with occasional spikes to 30°C during early heat waves. The 0% crowd probability suggests either extreme confidence in a specific range or insufficient liquidity attracting traders to edge cases. Comparable late-May weather patterns show Seoul experiences transition conditions between spring and early summer, with variability driven by whether Pacific high-pressure systems have begun their seasonal northward migration. Checking archived May datasets from prior years via Weather Underground's historical interface provides the baseline distribution needed to calibrate position sizing.

The primary catalyst is the East Asian monsoon onset timing, typically occurring in early June but occasionally triggering warm, humid air masses by late May. South Korean meteorological forecasts released in early May will signal whether anomalous warmth is expected. Traders should monitor the Korea Meteorological Administration's seasonal outlooks and cross-reference them against Weather Underground's forecast confidence intervals, which update daily. The resolution mechanism—pinning to a single airport station rather than city-wide averages—eliminates urban heat island variation, making the data source itself the critical dependency rather than methodological ambiguity.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Review UK, which mirrors the Polymarket order book directly.

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?

Polymarket Review UK 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.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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.

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, Polymarket Review UK triggers a quick verification flow that finishes in minutes.