Highest temperature in Seoul on July 7?

Platform comparison

Market context

Seoul’s July 2026 heat has shifted noticeably in the last 48 hours, with daily highs now tracking between 26°C and 34°C amid monsoon-driven humidity that pushes the “feels like” temperature above 36°C at midday[1][3]. The current 0% implied probability for a specific high-temperature bin on 7 July reflects not an absence of heat, but the extreme volatility introduced by the Jangma season, which concentrates heavy, short downpours in central inland cities like Seoul and can abruptly cap peak temperatures[3][4].

Historically, July in Seoul averages 27°C highs with 80% humidity, and while temperatures can approach 30°C, the monsoon’s interference makes sustained extremes rare; comparable cases from recent years show that even on hot days, a single rain event can drop the recorded high by 3–5°C within hours[3][4]. This pattern explains why the market assigns near-zero odds to any single high-temperature outcome: the weather is too unstable to resolve cleanly into a narrow bin without a clear, dry forecast window.

Traders should monitor the Korea Meteorological Administration’s short-range forecasts for the next 24 hours, particularly the 60% probability of rain and the 28°C (30°C felt) temperature projection for the coming afternoon[7]. A sudden shift to clear skies or a delay in the monsoon front could spike the high, but any precipitation event will likely suppress it; the key catalyst is whether the rain system moves east of Seoul before 7 July, a detail updated hourly by the KMA and major travel platforms[5][7].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Today trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.