Highest temperature in Seoul on June 26?

Platform comparison

Active sub-markets

Market context

Seoul is currently experiencing a sweltering heat wave that has shattered June temperature records across South Korea, with the capital reaching a daily average of 28.2°C on Monday, its fifth-highest June figure on record. This extreme thermal activity, driven by hot and humid air inflowing from the southwest, has pushed 59 out of 97 national weather stations to their highest daily averages for the month, creating a backdrop where the crowd-implied 0% probability for a specific high-temperature range appears statistically precarious given the recent volatility.

Historical precedents frame this current probability as dangerously low, particularly since Seoul’s absolute June record of 29.4°C was set just last year on June 20, suggesting that temperatures are already trending toward the upper limits of the seasonal envelope. With daily highs in June typically ranging between 77°F and 81°F but rarely exceeding 87°F, the recent surge to 26.2°C in Busan and 30.7°C in Daegu indicates that the thermal ceiling is actively being tested, making any single-range lock-in at zero odds a significant mispricing of the prevailing meteorological momentum.

Traders must monitor the Korea Meteorological Administration’s daily bulletins for updates on the inflow of humid air, as any intensification could push peak temperatures beyond the current 87°F threshold. Recent reports from the Korea Herald confirm that the heat wave is breaking records in multiple cities simultaneously, and with the settlement window closing on June 26, the immediate forecast showing highs up to 92°F suggests that the market is ignoring the tangible risk of a record-breaking spike in the Incheon area.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Seoul on June 26? on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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 Champions League Prediction, 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.

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.

What does it cost to trade on Champions League Prediction?

Zero. Champions League Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.