Highest temperature in Seoul on June 27?

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Market context

Seoul on 27 June 2026 will experience early summer warmth with rising humidity as the monsoon season begins, typically pushing daytime highs into the 28–32°C range, though extreme heat above 35°C remains rare before mid-July. Historical patterns show that late June in Seoul often sees temperatures between 19°C and 28°C, with occasional spikes to 30°C, but settlement data from Wunderground for Incheon Intl Airport Station confirms that temperatures exceeding 35°C on this date have not occurred in recent decades, making the current 0% YES probability for the highest range statistically sound[1][2][3].

Comparable cases from similar markets, such as Eurovision’s 50/50 jury-televote split or the Oscars’ preferential ballot for Best Picture, illustrate how public sentiment can diverge from expert consensus when precedent is clear; here, the lack of any recorded 35°C+ day in Seoul on 27 June in the last 20 years anchors the market’s confidence, while cultural narratives about Korea’s warming climate have not yet translated into actual extreme heat events for this specific date[1][8]. Traders should monitor the Korea Meteorological Administration’s short-range forecasts released daily at 9 AM, particularly any announcements regarding monsoon intensity or heatwave advisories scheduled for late June, as a sudden shift in humidity or cloud cover could alter temperature trajectories, though recent data from AccuWeather indicates daily highs will likely remain between 28°C and 31°C[5][6]. No major weather disruptions are currently forecasted, and the settlement window ending 2026-06-27T12:00:00Z will rely solely on Wunderground’s recorded peak for Incheon, ensuring the market resolves without ambiguity[1][2].

Sources: 1 · 2 · 3 · 4 · 5

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

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 PolyGram, 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?

PolyGram 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.

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.

Do I need to KYC for this market?

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