Highest temperature in Seoul on June 8?

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Market context

The Polymarket contract pricing this at 0% YES reflects traders' current assessment that Seoul's peak temperature on 8 June 2026 will fall outside whichever range this market settles to—likely the upper boundary. Seoul's early June climate typically peaks between 24–28°C, with occasional excursions toward 30°C during heat waves. The settlement mechanism tracks Incheon International Airport Station data via Wunderground, a standard meteorological reference point that captures official readings rather than urban heat island effects from central Seoul.

Historical June temperatures in Seoul show considerable year-to-year variation. The past decade's early June records range from 20°C on cooler days to 32°C during anomalous heat events, with 2018 and 2020 producing notably elevated readings. The 0% probability suggests traders expect the market's upper threshold to sit below typical June maxima, or that the specific range brackets have been set conservatively. Comparable weather markets on Polymarket typically see probability mass concentrate around 40–60% for meteorologically plausible outcomes, making this extreme pricing noteworthy.

South Korea's meteorological agency issues seasonal forecasts in May that traders monitor for El Niño or La Niña patterns affecting June conditions. The Korea Meteorological Administration's official outlook, typically released by late May 2026, will provide the nearest catalyst for probability shifts. Traders should also track mid-May atmospheric pressure systems and sea surface temperatures in the Western Pacific, which influence whether subtropical high-pressure systems establish early over the Korean peninsula. Real-time weather model consensus from GFS and ECMWF data becomes actionable from early June onwards.

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi UK, which mirrors the Polymarket order book directly.

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.

Is this market available outside the US?

Kalshi UK is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

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.