Highest temperature in Seoul on July 25?

Platform comparison

Market context

Seoul's peak temperature on 25 July 2026 will be measured at Incheon International Airport Station and resolved against historical weather data from Wunderground. The settlement window closes at 12:00 UTC that day, creating a hard deadline for traders to position before the final reading is locked in. Given the 0% crowd probability, the market currently reflects either extreme confidence in a specific temperature band or minimal trading activity; either way, the implied odds suggest limited conviction across the range options available.

July temperatures in Seoul historically cluster between 28–32°C, with occasional peaks above 33°C during heat waves. The city's 30-year average high for late July sits near 29°C, though the 2018 heat wave pushed readings to 39.6°C. Comparable East Asian airport stations show similar volatility; Incheon's coastal location moderates extremes slightly compared to central Seoul. The absence of any YES probability suggests traders may be waiting for clearer seasonal forecasts or treating this as a low-liquidity contract until nearer the settlement date.

The primary catalyst is the East Asian monsoon pattern in early-to-mid July, which determines whether high-pressure systems dominate the peninsula in the final week of the month. South Korean meteorological forecasts typically become reliable 10–14 days ahead; traders should monitor the Korea Meteorological Administration's extended outlook from mid-July onwards. Any Atlantic hurricane activity affecting Pacific jet streams could indirectly influence upper-level patterns over Korea, though such teleconnections remain probabilistic. USDC settlement will execute against Wunderground's historical archive once the day concludes and data is finalised.

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

What does a transaction cost on Polygon?

Polygon gas is typically under $0.01 per transaction. A full trade cycle (Approve + Order + Fill) totals around $0.03 — compared to $5-50 on Ethereum mainnet.

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.

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.