Highest temperature in Seoul (Incheon) on August 2?

Platform comparison

Market context

The event is the highest air temperature measured at Incheon International Airport on 2 August, and the market settles in USDC once the Wunderground daily record for that station is published and the resolution window closes. The current crowd pricing puts the biggest weight on the 32–33°C band, with 32°C leading and 33°C close behind, which is consistent with the market’s own embedded forecast of a hot but not extreme airport reading.[1]

That pricing sits below the broader Korea-wide heat picture. Yonhap reported the state weather agency expected daytime highs of 33–39°C across South Korea on Sunday, while Asiae’s station-by-station outlook placed Incheon at 33°C and Seoul at 35°C.[2][4] Reuters also reported a prolonged heatwave after South Korea logged a record 41.4°C in Yangsan on 31 July, underscoring that the synoptic set-up is severe even if coastal and airport readings typically run lower than inland peaks.[11]

For traders, the key catalysts are the final KMA short-range updates, any shift in cloud cover or sea-breeze influence around the airport, and whether afternoon heating can overshoot the consensus band before the first next-day datapoint locks the result.[5][1] In crypto terms, the contract’s value is still a pure weather read, but the main cross-asset driver is broader risk appetite rather than direct BTC or ETH sensitivity; funding and spot flows matter only insofar as they affect prediction-market liquidity, not the temperature itself.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reads Highest temperature in Seoul (Incheon) on August 2? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

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

What are crypto prediction markets?

Crypto prediction markets are on-chain smart contracts where you buy YES or NO shares on a future crypto event (e.g. "BTC above $100k by year-end"). The market price between 0¢ and 100¢ is the implied probability.

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.

Can I use Bitcoin directly?

No, Polymarket operates exclusively in USDC on Polygon. You can bridge BTC to USDC via an exchange or bridge service and deposit on Polygon — typically 10-30 minutes processing time.

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.

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.