Highest temperature in Seoul (Incheon) on August 7?

Platform comparison

Market context

Polymarket is pricing this Seoul/Incheon airport temperature contract at **0% YES** right now, with settlement tied to the highest reading recorded at Incheon Intl Airport Station on 7 August 2026 and paid out in **USDC** via **Polygon** conditional tokens. That flat pricing says the market is treating a qualifying temperature in the relevant range as effectively out of the money unless the day delivers an unusual spike.

That scepticism sits against a summer pattern that is normally warm, but not always extreme: August highs in Seoul average about 84°F/29°C, with typical daily highs in the low-to-mid 80s Fahrenheit and a modest downward drift through the month[1][15][17]. At the same time, current coverage points to a much hotter setup than average, with SBS reporting Seoul near 39°C and heatwave warnings expanded across the greater capital area earlier today[2]. Even so, airport readings can differ from downtown Seoul, and the market resolves only on the Incheon station’s recorded maximum, not on citywide forecasts or headline temperatures[2][5].

A trader should watch the Korea Meteorological Administration short-range updates, airport observations, and any shift in cloud cover, rain, or marine winds that could cap the daytime high before the settlement window closes[5][6]. Forecast products are mixed on the exact peak: some August outlooks lean towards low-30s Celsius with patchy rain, while others have recently shown a hotter, more volatile day structure[3][4][10]. For a Polymarket user, the key dependency is simple: whether the airport’s official daily maximum can clear the range the market is currently implying as impossible.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi 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.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Is Polymarket legal in the UK?

Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.