Highest temperature in Seoul on July 24?

Platform comparison

Market context

Polymarket is pricing this Incheon Intl Airport Station temperature contract at **0% YES** right now, which means the market is implying no chance of a daily high landing in the listed YES range unless fresh weather data forces a repricing. On Polymarket, the position settles in USDC on Polygon via conditional tokens, so the key question is not the Seoul headline temperature in general, but the specific highest reading reported by Wunderground for the airport station before the settlement window closes at 12:00 UTC.

The historical frame is straightforward: July in Seoul is normally warm, humid, and rain-prone, with typical highs around 27–30°C and frequent showers rather than persistent cool conditions.[1][7][8] That makes very low-probability pricing unusual only if the contract’s YES band is set well above the seasonal norm. Recent coverage from Korean weather reporting points to rain affecting the capital area on 24 July, while still warning that many regions may see maximum apparent temperatures above 33°C.[3] For traders, the practical read-through is that local cloud and rain can suppress the airport station’s daily maximum even when the broader metro area feels hot.

The main catalysts are the Korea Meteorological Administration’s short-range updates, the timing and intensity of rain over northern Incheon and the capital area, and the exact Wunderground high recorded for RKSI during the day.[3] If showers clear earlier than expected, afternoon heating can still lift the station’s peak, whereas sustained rain or marine flow tends to cap it. Because settlement depends on the single highest reported value, the last few hours of the UTC day matter as much as the morning forecast, especially if the market remains near zero until the observation is posted.

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 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 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 PolyGram 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.