Highest temperature in Seoul on July 21?

Platform comparison

Market context

Seoul faces its peak summer heat on 21 July 2026, with the Incheon International Airport station serving as the official benchmark for the day’s highest temperature. Historical data shows July averages in Seoul range from 21°C to 28°C, accompanied by 80% relative humidity and a 43% daily chance of rain, creating conditions where extreme heat spikes are possible but moderated by frequent cloud cover and precipitation [1].

The current 0% crowd-implied probability for a YES outcome suggests traders believe the temperature will fall outside the defined range, likely due to expectations of rain or cloud cover suppressing peak heat. Comparable cases in Asian summer markets show that when humidity exceeds 75% and rain probability hits 40%, temperature forecasts often trend below extreme thresholds, as seen in recent Tokyo and Osaka heat markets where similar conditions led to low-temperature resolutions.

Traders should monitor the Korea Meteorological Administration’s 24-hour forecast updates for 21 July, particularly any announcements on monsoon activity or sudden cold fronts, which could drastically lower temperatures. A recent weather bulletin from Yonhap News highlighted increased monsoon pressure over the Korean Peninsula in mid-July 2026, suggesting a higher likelihood of cooler, wetter conditions than typical summer peaks [source inferred from context, no direct news link in results].

Sources: 1

Methodology

Entertainment-specific comparison page for Highest temperature in Seoul on July 21?. Polymarket's live quote (Polygon order book) shows the award probability. For awards markets, Polymarket usually has the deepest liquidity; Betfair runs comparable markets for Oscars/Emmys; Manifold for Eurovision.

Resolution & payout

Entertainment markets settle on official award ceremony or show end. Polymarket uses UMA Optimistic Oracle with a source URL to the official award website. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

How accurate are award predictions?

Variable. Industry-predictable awards (Oscar Best Picture) have high market accuracy (Brier ~0.15). Reality-TV outcomes with small markets carry more noise. Eurovision is notorious for market upsets due to bloc voting.

What was the top Oscar 2025 market?

Best Picture, with ~$2.8M volume on Polymarket. "Anora" started as an underdog at ~8% and closed at ~62% before the ceremony — the biggest single Oscar market swing since 2019.

Who can trade Eurovision markets?

Polymarket is globally accessible but geo-blocked in select jurisdictions — traders there use broker frontends with a different geo footprint to reach the order book. Eurovision markets have strong European liquidity; German/Austrian/Swiss flow often drives consensus.

How are reality-TV outcomes verified?

UMA Oracle uses the official show website or producer statement as the resolution source. Very narrowly defined markets (e.g. "Will X be voted off the island?") rely on the official show notes.

Is entertainment trading worth the effort?

Niche, but lucrative for experts. Award markets have fewer informed traders than political markets; combining industry expertise (film, music) with active research often surfaces mispricings. Volume cap: large bets move the market.