Highest temperature in Seoul on July 4?

Platform comparison

Market context

Seoul’s early July climate typically delivers daily highs between 27°C and 31°C, with the 29°C mark sitting at the centre of this historical range. Korea Meteorological Administration records show that temperatures rarely dip below 24°C or exceed 35°C during this period, though extreme outliers have occurred, such as Seoul’s 37.7°C peak in 2023—the highest early July reading in 117 years[1][7]. The current market assigning 0% probability to a 29°C hit appears misaligned with this baseline, as historical data suggests a roughly one-in-three chance for that specific bracket, with six other ranges sharing the remaining probability[1]. Traders should note that NO is the favoured side at 66% implied probability, reflecting the genuine width of Seoul’s temperature window where no single outcome commands majority support[1].

Key catalysts for this market include real-time updates from Weather Underground, which serves as the official resolution source for the Incheon International Airport Station’s daily maximum temperature[1]. Traders must monitor the Korea Meteorological Administration’s live forecasts for 4 July 2026, particularly any announcements regarding the North Pacific high-pressure system, which drives hot, humid conditions capable of pushing temperatures toward 35°C[4]. Recent news highlights South Korea’s second-hottest July since 1973, with an average of 27.1°C, suggesting a trend toward warmer-than-average early July conditions that could invalidate the current 0% probability for 29°C[6]. Additionally, watch for tropical night alerts, as overnight temperatures above 25°C for 22 consecutive days have recently broken century-old records, indicating sustained heat that may elevate the day’s peak[8]. The market closes at noon KST on 4 July 2026, so timely data from Wunderground is critical for final positioning[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Football-specific comparison page for Highest temperature in Seoul on July 4?. 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 (US-focused) or Manifold (play-money).

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.

FAQ

Are prediction markets better than sports betting?

Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.

Can I bet on individual matches?

Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.

Which sports markets are available?

Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.