Highest temperature in Seoul on June 17?

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Market context

The market currently prices at 0% YES, reflecting the conditional token structure on Polygon where traders hold USDC-denominated positions on Seoul's peak temperature on 17 June 2026. Incheon International Airport Station serves as the official measurement point, with Wunderground's historical database providing settlement data. This flat pricing suggests minimal trading activity or consensus that the specified temperature range falls outside realistic bounds for mid-June in Seoul.

Seoul's June temperatures historically cluster between 20–28°C for daily highs, with occasional peaks reaching 30°C during early heat waves. The 2023 and 2024 records show mid-June highs typically ranging 24–27°C; the 0% probability implies traders expect the actual high to fall outside whatever range this market's resolution brackets define. Without visibility on the exact temperature bands coded into the contract, the null probability may indicate either an implausibly narrow range or a technical issue with market construction rather than genuine meteorological uncertainty.

South Korea's meteorological agency (KMA) publishes seasonal forecasts in May, which will provide the first substantive catalyst for repricing. El Niño or La Niña conditions entering 2026 could shift June temperature expectations materially. Real-time monitoring begins in early June when weather models converge on actual atmospheric patterns; traders should track KMA's 10-day forecasts from mid-June onwards. Any unusual heat dome formation over East Asia in the preceding weeks would signal upward pressure on Seoul's expected highs and potentially activate dormant YES positions.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

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?

On Kalshi UK, which mirrors the Polymarket order book at 0% fees. 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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Kalshi UK triggers a quick verification flow that finishes in minutes.