Highest temperature in Seoul (Incheon) on August 21?

Platform comparison

Market context

Seoul's weather in late August typically sits in the 28–32°C range, with humidity levels around 60–75% as the summer monsoon season begins to transition. August 21st falls within the period when afternoon highs in the Incheon area most frequently peak between 29–31°C, though extreme heat events pushing above 33°C do occur roughly once every five to seven years during particularly intense high-pressure systems. Historical data from Incheon International Airport Station shows that temperatures exceeding 35°C on this specific date are exceptionally rare, with only isolated instances recorded in the past two decades.

The 0% crowd probability reflects the market's current assessment that extreme heat thresholds are unlikely. Traders should monitor weather forecasts released in the week leading up to August 21st, 2026, particularly any alerts from the Korea Meteorological Administration regarding heat waves or unusual atmospheric conditions. Tropical cyclone activity in the Western Pacific during mid-to-late August can significantly influence Korean peninsula temperatures; any systems tracking toward the region would alter moisture and wind patterns substantially. The resolution methodology specifies use of Weather Underground's Daily Observations table from Incheon Intl Airport Station, which typically records temperatures at hourly intervals, making the exact highest reading the determining factor rather than summary high-low figures.

Methodology

Sports-specific comparison page for Highest temperature in Seoul (Incheon) on August 21?. 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.

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