Highest temperature in Seoul (Incheon) on August 14?

Platform comparison

Market context

Seoul's highest temperature on 14 August 2026 will be measured at Incheon International Airport Station and resolved against the Daily Observations table on Weather Underground, with settlement in USDC on the btc-prediction.bet platform. The market currently shows 0% implied probability across all temperature bands, suggesting either incomplete pricing or a data lag in crowd assessment.

August temperatures at Incheon historically cluster between 28–32°C for daily highs, with extreme heat events pushing into the 35–37°C range roughly once per decade. The 2018 Korean heat wave saw Seoul reach 39.6°C in early August; more recently, August 2023 peaked at 33.1°C at Incheon. The 0% probability across all brackets is anomalous given that historical August highs virtually guarantee *some* temperature band will resolve YES. This disconnect likely reflects thin liquidity or settlement mechanics unfamiliar to the crowd rather than genuine weather forecasting consensus.

Traders should monitor the Korea Meteorological Administration's seasonal outlook, typically issued in late July, and track Pacific high-pressure systems that drive Korean summer heat. The East Asian summer monsoon pattern and any tropical cyclone activity in the Western Pacific during early-to-mid August will be material to whether temperatures trend toward the 28–30°C baseline or spike into the 33°C+ bands. Real-time weather model updates from GFS and ECMWF become actionable from mid-August onward, though the settlement window closes at 12:00 UTC on 14 August, limiting post-event trading windows.

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

UK Frequently Asked Questions

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

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%.