Pronóstico: Highest temperature in Seoul on July 27?

Platform comparison

Market context

Polymarket is pricing this contract at **0% YES** today, which means the market is effectively saying it assigns no chance to the highest temperature at Incheon Intl Airport Station landing in the contract’s listed Celsius band on 27 July. Because settlement uses the Wunderground daily history page for RKSI and not a citywide impression of Seoul, traders need to focus on the airport station’s recorded maximum within the settlement window and the exact temperature bucket, not just whether the day feels hot across the capital region.

That zero price is easiest to read against seasonal norms and nearby comparables. July in Seoul is typically hot, humid and rain-prone, with average highs commonly in the upper 20s Celsius and frequent showers during the monsoon period, while current forecast coverage for 27 July shows Seoul around 26–33°C with showers expected in the capital region. That makes a very low outcome plausible if cloud and rain suppress the afternoon peak, but it also leaves room for a brief spike if the sun breaks through. The contract is also a good example of how Polymarket’s conditional tokens on Polygon can diverge from broader weather headlines: USDC collateral and on-chain settlement do not change the underlying meteorology, only how the market prices the event.

The main catalysts are the day-of forecast updates, rainfall timing, and any shift in the strength or placement of showers over Incheon and western Seoul. Traders should watch whether morning rain lingers into the midday heating window, since that would cap the station maximum, while a clearing trend would raise the odds of a higher reading at the airport than the city forecast alone suggests. With settlement ending at 12:00 UTC, the relevant local window is still in the afternoon in Korea, so later temperature revisions and the exact Wunderground observation matter more than overnight speculation.

Sources: 1 · 2 · 3 · 4 · 5

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 Qué Es. 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'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.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

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