Highest temperature in Seoul on July 23?

Platform comparison

Market context

Polymarket currently prices this contract with **27°C** as the frontrunner at **49%**, while **28°C** sits at **30%**, so the market is still leaning towards a fairly standard late-July ceiling rather than an extreme heat outcome. Because settlement is tied to the highest temperature at **Incheon Intl Airport Station** on the day, the on-chain position is effectively a view on the day’s single recorded peak, not the broader feel of Seoul weather, and winnings settle through **USDC** on **Polygon** via the market’s conditional-token structure.[1]

That shape fits the seasonal baseline. Independent weather write-ups for South Korea in July point to highs around **30°C** and lows near **23°C**, while Seoul-specific coverage describes July daytime readings commonly in the **25–30°C** range, with **27°C** a useful “typical” anchor and only occasional pushes to about **30°C**.[2][3] In that context, a zero-priced YES on the market’s exact headline question implies traders are assigning little value to any outcome that would clear the contract’s threshold, despite the fact that nearby temperature bands remain the most plausible landing zone.[1][2][3]

For a trader, the key catalysts are the live weather set-up rather than a calendar event: cloud cover, monsoon rain bands, humidity, and whether a brief afternoon surge can still deliver a higher station reading before the settlement window closes. Because the source is **Wunderground** for the airport station, the relevant watchlist is the day’s hourly progression and the final daily high on that page, not a general Seoul forecast page.[1]

Sources: 1 · 2 · 3

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 Polymarket Scam?, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Polymarket Scam?. 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 Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

Do I need to KYC for this market?

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