Highest temperature in Seoul on June 2?

Platform comparison

Market context

Seoul's weather on 2 June 2026 will be measured at Incheon International Airport Station, with the day's peak temperature determining which range resolves YES. Polymarket currently prices all temperature brackets at 0%, reflecting the market's nascent state rather than any meteorological certainty. The settlement mechanism uses Wunderground's historical data archive, requiring traders to verify the exact reading against that source on or after the resolution window closes at 12:00 UTC on 2 June.

Early June in Seoul typically sees temperatures between 22–28°C as the region transitions into summer. Historical data from previous years shows considerable variability: June 2023 recorded highs near 27°C whilst June 2024 saw peaks around 25°C, with humidity levels rising sharply as the pre-monsoon period approaches. These patterns suggest the most probable outcomes cluster in the mid-to-high 20s Celsius, though anomalous heat events remain possible given broader East Asian climate trends.

Traders should monitor seasonal forecasts from the Korea Meteorological Administration, which typically issues 10-day outlooks in late May. Any significant weather systems—including early monsoon activity or heat domes affecting the Korean peninsula—would shift probabilities materially. The timing of Seoul's rainy season onset, usually occurring in mid-June, creates a boundary condition: if the monsoon arrives early, maximum temperatures may remain suppressed; if it delays, heat accumulation could push readings higher than the historical median.

Methodology

This page reviews Highest temperature in Seoul on June 2? 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

Resolution source: This market settles from the official publication at https://www.wunderground.com/history/daily/kr/incheon/RKSI. A proposer submits the result to the UMA Optimistic Oracle on Polygon, the two-hour challenge window opens, and the smart contract pays out in USDC.

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.