Highest temperature in Seoul on May 30?

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Market context

Seoul's highest temperature on 30 May 2026 will be recorded at Incheon International Airport Station and measured in Celsius. The settlement hinges on Weather Underground's historical data archive for that specific date, with resolution occurring at 12:00 UTC on 30 May. The 0% crowd probability suggests either extreme confidence in a particular temperature band or minimal trading activity to date.

Seoul experiences late spring conditions by late May, with historical highs typically ranging between 24–28°C during this period. The Korea Meteorological Administration's records show May 30 averages around 25°C, though outlier years have recorded peaks above 30°C during early heat waves. Comparable May-end weather patterns from 2015–2024 provide the most reliable baseline; notably, 2020 saw a 29.2°C high on 30 May, whilst cooler years such as 2017 registered only 22.1°C. The wide historical variance explains why no single temperature band commands overwhelming trader conviction at present.

Traders should monitor the Korean Meteorological Administration's seasonal forecasts released in April and early May 2026, which typically project temperature anomalies three to four weeks ahead. Pacific high-pressure systems and monsoon onset timing—both announced via KMA advisories—materially influence Seoul's late-May peaks. Additionally, El Niño or La Niña conditions announced by the Japan Meteorological Agency affect East Asian weather patterns with measurable lead time. The absence of scheduled weather events or known atmospheric disruptions currently limits near-term catalysts, placing this market largely dependent on standard seasonal dynamics and real-time atmospheric conditions as May approaches.

Methodology

This page reviews Highest temperature in Seoul on May 30? 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 Polymarket Legal UK — 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

Where can I trade this market with the lowest fees?

On Polymarket Legal UK, 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?

Polymarket Legal 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.

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 Polymarket Legal UK?

Zero. Polymarket Legal UK 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.