Highest temperature in Seoul on June 25?

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Market context

On 25 June 2026, Seoul is expected to experience mostly cloudy conditions with temperatures ranging between 18°C and 26°C, while humidity often exceeds 80%, creating a real-feel temperature that can surpass 35°C[1][6]. The market tracks the highest temperature recorded at Incheon International Airport, not the city centre, which typically sees slightly lower peaks due to coastal influence. With the crowd-implied probability of a higher range sitting at 0%, traders are betting that extreme heat will not materialise, a stance that aligns with early June’s historically milder profile compared to late summer[2].

Historical data shows that late June in South Korea frequently brings monsoon rains and rising humidity, yet extreme heat events above 35°C remain uncommon before July[3][7]. Comparable cases from previous years indicate that while daytime highs can reach 30°C, the Incheon station rarely records temperatures exceeding 32°C during this period[4]. The current 0% probability suggests the market is pricing in a high likelihood of moderate conditions, consistent with the typical weather pattern where afternoon showers limit sustained heat spikes[9].

Traders should monitor the Korea Meteorological Administration’s short-range forecasts for any sudden shifts toward dry, hot air masses, as well as updates on monsoon timing which could suppress temperatures[5]. Recent weather reports from 25 June 2026 confirm no extreme heat, with midday highs at 27°C and heavy afternoon showers, reinforcing the expectation of moderate conditions[8]. Regulatory accessibility remains a key factor: under German GlüStV and US CFTC frameworks, platforms offering “no-KYC up to $1,500” allow broader participation without identity verification, though this does not exempt users from tax obligations or KYC requirements for larger trades.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Seoul on June 25? 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 PolyGram — 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 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.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.