Highest temperature in Seoul on July 24?

Platform comparison

Market context

The relevant real-world event is the **highest temperature reached at Incheon International Airport on 24 July**, measured in Celsius and settled from the day’s Weather Underground history page. Early market pricing at **0% YES** implies the crowd is currently assigning no chance to a qualifying temperature band, even though late-July conditions around Seoul and Incheon are typically warm and can still produce high daytime readings despite rain interruptions. July normals in Seoul are around **30°C highs** with frequent rainfall, so a zero price is best read as a statement about this contract’s narrow settlement mechanics rather than about whether the day will be cool overall.[1]

Comparable summer cases in Korea usually turn on whether cloud cover and rain suppress the airport’s peak reading rather than on citywide heat headlines. Recent coverage pointed to rain affecting the capital area while much of Korea remained very hot, with apparent temperatures above **33°C** and rain bands over Incheon and northern Gyeonggi; that kind of split pattern is material because airport maxima can differ from downtown Seoul and can miss broader urban heat if showers arrive early.[3] The market’s wording also matters: settlement uses the **single highest recorded temperature** at Incheon Intl Airport Station, not an average, forecast high, or Seoul municipal observation, so late-afternoon spikes can still decide the outcome even after a damp start.[3]

Traders should watch the evolution of the rain forecast, especially the timing and intensity of any showers around the airport, because that is the main dependency for the day’s maximum. The latest public forecast for Seoul has shown **sunny** conditions with a feel-like temperature around **28°C**, but this can diverge quickly from airport-specific observations if convection develops or a rain band stalls over the west coast.[2] In a prediction-market setting, the practical on-chain angle is simple: the contract settles in **USDC** once the source observation is available, so the important catalyst is not crypto macro but whether the meteorological setup allows a clean afternoon high near or above the relevant temperature band.[2][3]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically this overview focuses on on-chain pricing: Polymarket's live mid comes from the Polygon conditional-token order book and settles automatically in USDC. The other three venues — Kalshi, Betfair, Manifold — sit alongside as off-chain reference points so you can see how the contract translates across regulatory and settlement regimes.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

FAQ

Why USDC and not ETH or USDT?

USDC is the Polygon standard — audited reserves (Circle, monthly attestation), deepest order book, low gas costs. ETH volatility would distort probability quotes; USDT has thinner Polygon liquidity than USDC.

How does UMA secure the resolution?

The UMA Optimistic Oracle uses a bond system: a proposer posts a bond, a two-hour challenge window opens. On dispute the losing side forfeits the bond — financial incentive for honest resolution.

How volatile are crypto prediction markets?

Crypto markets react to spot prices — a 5% BTC move typically shifts a "BTC above X by date" market 10-20%. Polymarket crypto market liquidity is usually six-figure USD, sufficient for active trading.

Which crypto markets exist on Polymarket?

Currently active markets include BTC/ETH/SOL price targets, halving dates, ETF approvals, hard-fork outcomes and Layer-2 TVL thresholds. The list updates weekly; biggest volume sits on BTC and ETH price forecasts.

Are crypto prediction markets taxable in the US?

In the US, prediction market gains are typically treated as ordinary income or short-term capital gains depending on holding period. Consult a tax professional for your specific situation — we cannot provide tax advice.