Highest temperature in Seoul on July 27?

Platform comparison

Market context

Seoul’s daytime maximum on 27 July is being shaped by a monsoon pattern rather than a clean summer heat spike, with showers forecast from the morning across the capital region and daily highs for Seoul placed at 26–33°C. The market resolves on the highest temperature recorded at Incheon Intl Airport Station on that date, so the practical question for a trader is not whether Seoul feels hot, but whether the station posts a peak that lands in the lower or upper end of the forecast band.[1]

The current 0% implied probability of a YES outcome looks consistent with a market that has already been pushed towards a low-ceiling reading: July in Seoul is usually humid, rainy and clustered around the high-20s to low-30s, with typical highs near 30°C and frequent showers rather than sustained extreme heat.[2][3] For a programmatic approach, the useful inputs are the terminal Wunderground history page, the day’s observed high updates, and the forecast path into late morning and early afternoon, when the daily maximum is most likely to print; anything that nudges the airport station below or above a pre-set temperature bucket can matter more than the citywide headline alone.[1]

The main catalysts are the timing and intensity of the morning rain band, plus whether cloud cover holds down insolation at the airport site. A recent Korean weather report flagged showers in Seoul, Incheon and Gyeonggi from the morning, with daytime highs across the capital area capped in the low 30s and no sign of a broad heat breakout.[1] For automation, this is a straightforward monitoring market: ingest the forecast, watch any nowcasting updates or radar shifts, and compare the evolving high against the relevant temperature range thresholds rather than the headline city forecast.[1]

Sources: 1 · 2 · 3 · 4

Methodology

This page reviews Highest temperature in Seoul on July 27? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Bot UK, which mirrors the Polymarket order book at 0% fees.

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 Bot UK. 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.

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.