Highest temperature in Seoul on July 8?

Platform comparison

Market context

Seoul is bracing for extreme heat on 8 July 2026, with meteorologists warning that temperatures could surpass 40°C as the city faces one of its most intense summer heat waves in recorded history[2]. The market currently implies a 0% chance that the highest temperature at Incheon International Airport will fall within the specified range, a stark divergence from historical precedents where early July has routinely seen record-breaking highs.

Historical data frames this probability with caution: Seoul reached 37.8°C on 8 July in a previous year, the highest early-July temperature ever recorded since 1908[1], and 37.7°C in another instance, beating a 117-year-old record[8]. Typical July highs hover around 25–30°C, but humidity often pushes the “feels like” temperature beyond 34°C, with recent forecasts indicating daily highs between 80°F and 92°F (27–33°C)[3][5]. The 0% implied probability suggests traders expect the temperature to exceed the range, yet comparable cases show such extremes are not unprecedented.

Traders should monitor real-time updates from the Korea Meteorological Administration, which currently reports a 40% chance of precipitation and a maximum temperature of 31°C for the day[6], alongside heat wave advisories upgraded to warnings across most regions[2]. The monsoon season, which typically lasts until mid-July, may bring short but heavy rainfalls that could temporarily cool the air, though humidity levels above 80% often sustain high “feels like” temperatures[3]. Recent news confirms South Korea is on track for record heat, with temperatures potentially soaring beyond 40°C, making weather schedules and heat advisories critical catalysts for this contract[2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, 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?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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?

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