Highest temperature in Seoul on June 23?

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Market context

Seoul is currently experiencing its hottest June in 52 years, with daytime temperatures hitting 35.6°C on 19 June, a record not seen since 1958[1]. Historical averages for June in Seoul typically peak between 25°C and 29°C, rarely exceeding 31°C, though extreme heat events can push readings toward 35°C or higher[2][6]. The current crowd-implied probability of 0% for the market suggests the consensus believes the temperature on 23 June 2026 will fall within a lower range, yet the recent surge in heat creates a contrarian value spot where the underdog (higher temperature) may offer significant upside if the heatwave persists[1][4].

Traders must monitor the North Pacific high-pressure system, which is driving hot, humid conditions and could sustain temperatures above 35°C through late June[6]. The Korea Meteorological Administration forecasts a 40% chance that July’s average temperatures and precipitation will match or exceed previous years, indicating a potential continuation of this extreme pattern[1]. While no specific weather announcements are scheduled for 23 June, the dependency on the Incheon International Airport Station’s recorded data means any localized cloud cover or wind shifts could alter the final reading, making the recent heat record at Hongcheon (41.0°C) a critical benchmark for potential extremes[3]. The value lies in betting against the 0% consensus if the high-pressure system remains dominant, as the historical data supports a higher probability of extreme heat than the market currently prices[1][3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win 2026, which mirrors the Polymarket order book directly.

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

Where can I trade this market with the lowest fees?

On Who Will Win 2026, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Who Will Win 2026 is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Who Will Win 2026 triggers a quick verification flow that finishes in minutes.