Highest temperature in Seoul (Incheon) on August 1?

Platform comparison

Market context

Polymarket has this contract at **0% YES** right now, so the market is effectively pricing in no move into the higher Celsius bands before settlement even though the underlying event is still live. For a user holding USDC on Polygon, the relevant question is not whether Seoul feels hot in general, but whether the **highest temperature at Incheon Intl Airport Station** lands in the specific resolution band captured by the market’s conditional tokens.

The recent backdrop argues for caution around an ultra-low quote, because South Korea is in a severe heatwave and the first day of August has already started warm. Reuters reported the country’s hottest-ever reading at 41.4°C in Yangsan on 31 July, while KMA-linked reporting showed pre-dawn temperatures around 27.0°C in Incheon and daytime highs expected to reach the low- to mid-30s across major cities on 1 August.[6][4][16] Incheon’s long-run August average high is far lower, around the upper-20s Celsius, but late-summer heat spikes regularly run well above climatology.[17][5]

For traders, the main catalysts are the Korea Meteorological Administration short-range forecast updates, the actual intraday temperature path, and any sea-breeze or cloud-cover changes over the airport corridor that could cap the day’s maximum. The market will resolve from Wunderground’s daily history page for Incheon Intl Airport Station, so the key watchpoint is the recorded daily high there rather than a Seoul city reading or a regional average.[3] With the settlement window ending at 12:00 UTC, the on-chain token can stay sensitive into the Korean afternoon when the day’s maximum is typically set.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Seoul (Incheon) on August 1? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

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.

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.