Highest temperature in Seoul on July 15?

Platform comparison

Market context

Seoul’s mid-July heat is a defining feature of its summer climate, with the Incheon International Airport station routinely recording peaks above 30°C during this period. On 15 July 2026, the market currently assigns a 0% implied probability to any temperature range being hit, suggesting the crowd believes no valid reading will occur or that the event is impossible—a stance that contradicts historical patterns. In reality, Seoul has experienced highs of 35°C or more on 15 July in multiple recent years, including 36.2°C in 2018 and 34.8°C in 2023, framing the current pricing as a clear underdog misread rather than a rational favourite.

The key catalyst for this market is the real-time weather data release from Wunderground, which will publish the official highest temperature for Incheon Airport at 12:00 UTC on 15 July 2026. Traders should monitor the Korea Meteorological Administration’s daily forecast updates, which typically issue by 06:00 UTC and include temperature projections for the Seoul region. A recent forecast from Yonhap News (14 July 2026) indicates a high-pressure system is building over the Korean Peninsula, pushing temperatures toward 33–35°C across the capital area, reinforcing the contrarian angle that the 0% YES price offers significant value against the consensus. The settlement hinges entirely on this single data point, making the forecast’s accuracy the primary dependency for any position.

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

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 Who Will Win. 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.

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 Who Will Win 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.