Pronóstico: Highest temperature in Seoul (Incheon) on August 8?

Platform comparison

Market context

Polymarket is pricing the **highest temperature at Incheon International Airport Station on 8 August** at **0% YES**, which implies the contract is trading as if no path to the relevant temperature band is being assigned any meaningful probability. On Polymarket, buyers hold USDC-backed conditional tokens on Polygon, so the practical question is whether the day’s top reading in Weather Underground’s **Daily Observations** table lands inside the specified Celsius range, not whether Seoul feels hot in a general sense.

That scepticism is consistent with the broader late-summer pattern, where Seoul and the surrounding airport station often print highs in the low-to-mid 30s Celsius but can still miss a band if cloud cover, rain, or timing shifts the peak observation. Forecasts for 8 August point to hot conditions with showers or thunderstorms in the region, with Seoul guidance clustering around the mid-30s Celsius and a chance of afternoon precipitation, which makes the exact hourly maximum more important than the headline daily high. Comparable Seoul summer markets tend to move only when traders see a clear forecast break from the usual seasonal range, or when a cooler, wetter setup reduces confidence in the upper temperature bins.

The main catalysts are the live Weather Underground observations during the local daytime heating window, plus any updated model runs that shift the expected peak before the UTC settlement cut-off. Traders should watch whether the airport station tracks the nearby Seoul forecasts or diverges because of coastal influence, rainfall timing, or cloud cover; those are the variables most likely to change the highest observed reading. Because the market resolves off the Daily Observations table rather than a summary display, the final print can differ from what casual weather pages imply, so the on-chain price will react most to the actual station data as it accumulates.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Pronóstico: Highest temperature in Seoul (Incheon) on August 8? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

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.

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.

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.