Highest temperature in Seoul (Incheon) on August 15?

Platform comparison

Market context

Seoul's weather on 15 August 2026 will be measured by the highest temperature recorded at Incheon International Airport Station, with resolution determined by the Daily Observations table on Weather Underground rather than summary figures. The settlement window closes at midday UTC on that date, meaning the full day's temperature data must be available before resolution occurs.

Mid-August in Seoul typically falls within the peak of the Korean summer monsoon season, when temperatures regularly exceed 30°C. Historical records from Incheon show August highs averaging 29–31°C, though extreme heat events have pushed readings above 35°C in recent years. The 0% crowd probability suggests traders are pricing in either a specific temperature threshold that historical data makes unlikely, or uncertainty about the exact resolution methodology given the emphasis on the Daily Observations table over summary data—a distinction that occasionally produces discrepancies on Weather Underground.

Traders should monitor long-range forecasting models from mid-July onwards, as seasonal patterns and any developing heat domes or tropical systems could shift August 15 conditions materially. The Korea Meteorological Administration typically issues detailed forecasts 10–14 days in advance; these will be the primary real-time catalyst for probability shifts. Additionally, any maintenance or sensor changes at Incheon Airport's weather station could affect data recording, though such disruptions are rare and typically announced in advance through aviation notices.

Methodology

Sports-specific comparison page for Highest temperature in Seoul (Incheon) on August 15?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

UK Frequently Asked Questions

When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

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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.

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