Highest temperature in Seoul on June 26?

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Market context

The underlying event is the peak daily temperature at Incheon International Airport on 26 June 2026, a metric that will determine whether the market resolves to a specific Celsius range or the default outcome. With the crowd-implied probability for the "YES" outcome sitting at a stark 0%, the consensus is heavily positioned against any extreme heat spike, treating the day as a standard mid-summer afternoon. This pricing suggests the market views the underdog scenario of a record-breaking high as virtually impossible, yet value may lurk for contrarian traders who recognise that recent seasonal anomalies in South Korea have consistently defied historical averages.

Historical data frames this probability with caution, as June highs in Seoul typically climb from 77°F to 81°F, rarely exceeding 87°F, yet the nation recently shattered its all-time heat record with 41.0°C in Hongcheon [1][2]. The trend of record-breaking June temperatures is undeniable, with 59 out of 97 weather stations logging their highest daily averages for the month just recently [6]. This pattern of escalating heat suggests the current 0% pricing may be an overreaction to the mean, ignoring the genuine value spot in betting against the consensus that ignores the accelerating thermal baseline.

Traders must monitor the Korea Meteorological Administration’s daily heat advisories and the specific cloud-cover forecasts for the Incheon station, as these are the primary dependencies for a temperature spike [5]. Recent reports confirm that South Korea recorded its highest average summer temperature on record, with June averages hitting 25.6°C across the country [5]. The catalyst for a contrarian win lies in the persistent upward trajectory of summer heat, meaning the market’s dismissal of extreme temperatures may be a costly error if the forecasted 84° to 92° highs for June 2026 materialise [4].

Sources: 1 · 2 · 3 · 4 · 5

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 Who Will Win, 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

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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.