Highest temperature in Seoul on June 27?

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Market context

On 27 June 2026, the Incheon International Airport Station will record its highest daily temperature, which determines the outcome of a prediction market where the crowd currently assigns zero probability to any temperature range exceeding typical June highs. This real-world event hinges on whether the ongoing heatwave, which has already shattered June records across South Korea, intensifies further in the capital region. The current 0% YES probability suggests traders believe temperatures will remain within standard bounds, yet recent data indicates a volatile thermal environment that could defy historical norms.

Historical June weather in Seoul shows daily highs typically rising from 77°F to 81°F, rarely exceeding 87°F, while recent heatwaves have pushed temperatures significantly higher in other cities like Daegu and Mokpo, where records were broken on 27 June 2026 [1]. The all-time national record of 41.0°C at Hongcheon demonstrates South Korea’s capacity for extreme heat, though Incheon’s coastal location usually moderates extremes [3]. Given that 59 out of 97 stations recorded their highest June averages between 24 and 26 June, the current 0% probability may underestimate the likelihood of a record-breaking day in Seoul [1].

Traders should monitor real-time updates from Wunderground for the Incheon station, as the resolution source is explicitly tied to this data point [3]. Key catalysts include announcements from the Korea Meteorological Administration regarding heatwave severity and any sudden shifts in wind patterns that could amplify or suppress temperatures [1]. With the settlement window ending at 12:00 UTC on 27 June, immediate attention to hourly temperature logs is critical, especially as recent trends show a sharp late-breaking surge in heat across the region [7]. No generic forecasts will suffice; only precise, station-specific data will determine the market outcome.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Seoul on June 27? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Champions League Prediction — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Champions League Prediction, 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.

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.

What does it cost to trade on Champions League Prediction?

Zero. Champions League Prediction routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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, Champions League Prediction triggers a quick verification flow that finishes in minutes.