Highest temperature in Seoul (Incheon) on August 10?

Platform comparison

Market context

The market is effectively pricing **no chance** of a high ending up in the listed range, with the crowd-implied probability at **0% YES**. That makes the current consensus an emphatic underdog view on any outcome that needs the Incheon Airport station’s daily maximum to land in the target band, even though recent regional heat has been extreme and Seoul has already logged near-record readings this month.[2][8][11]

For handicapper context, the historical read is that **August in Seoul is usually hot, but not uniformly extreme**: long-run August averages sit around the low 30s Celsius, while current forecasts from private and official sources have been clustering near the mid-30s rather than the upper 30s.[9][10][2] The key contrarian angle is that a single clear, strongly insolated afternoon can still punch through consensus, especially after the recent heatwave drove Seoul above 40°C in parts of the capital area and lifted market attention to the possibility of another overshoot.[7][8][13]

Traders should watch the **Korea Meteorological Administration short-range forecasts**, cloud cover, and whether easterly flow or afternoon convective showers develop, because those are the main factors that can pull a station reading down from the forecast envelope.[4][2] Reuters reported on 6 August that the heatwave was expected to peak over Seoul that day, underscoring how quickly the setup has been shifting; for this market, the real dependency is whether Incheon’s coastal influence and the timing of the day’s first and last official observations leave room for a late-day high, since the resolution source is the Weather Underground daily observations table rather than the headline day-high figure.[8]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Seoul (Incheon) on August 10? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Who Will Win, which mirrors 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.

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 Who Will Win. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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%.