Highest temperature in Seoul on May 30?

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Market context

The settlement hinges on the maximum temperature recorded at Incheon International Airport on 30 May 2026, with the crowd currently assigning zero probability to any outcome—a reflection of the market's early stage rather than genuine certainty about conditions. Seoul's late May weather sits at the threshold between spring and early summer, with historical highs typically ranging between 26°C and 30°C during this period. The 0% implied probability suggests traders have not yet engaged meaningfully with the market's temperature bands, leaving the full distribution unpriced.

Historical May 30th data from Incheon shows considerable variability. The station has recorded highs as low as 18°C and as high as 32°C on this specific date across different years, reflecting the volatility of late-spring weather patterns in the Korean peninsula. Seasonal trends indicate that 2026 falls within a typical range where temperatures between 25°C and 29°C represent the modal outcomes, though anomalously warm or cool days remain plausible. The absence of any crowd conviction suggests early-stage market formation rather than genuine consensus.

Traders should monitor spring weather patterns through April and May 2026, particularly any signals about the timing and intensity of early summer warming. The Korean Meteorological Administration typically issues seasonal outlooks in March and April that could shift expectations. Incheon's coastal location moderates extremes compared to inland Seoul, a distinction worth noting when evaluating which temperature bands offer value relative to historical frequency distributions.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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

Where can I trade this market with the lowest fees?

On Who Will Win 2026, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Who Will Win 2026 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.

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, Who Will Win 2026 triggers a quick verification flow that finishes in minutes.