Highest temperature in Seoul on June 20?

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Market context

Seoul is experiencing a sweltering heat wave that has pushed daily averages to record levels for June, with the capital hitting 28.2°C on Monday, the fifth-highest June figure ever recorded[1]. This surge in temperature frames the current 2% crowd-implied probability for a specific high-temperature range on 20 June 2026, as the market leans heavily on the catalyst of last year’s record of 29.4°C set precisely on 20 June[1]. Historical data shows June highs in Seoul typically climb from 77°F to 81°F, rarely exceeding 87°F, suggesting that while heat is intensifying, extreme outliers remain statistically uncommon[2].

Traders should monitor upcoming weather agency announcements and any scheduled climate declarations that could signal further heat spikes, as the Korea Meteorological Administration has already flagged new records in Busan and Daegu amid this wave[1]. The resolution source, Wunderground, will capture the highest temperature for all times on 20 June at Incheon Intl Airport Station, making real-time monitoring of local forecasts critical as the settlement window closes on 2026-06-20[4]. Recent campaign-finance disclosures related to environmental policy may also influence public sentiment on heat mitigation, though the primary market driver remains the immediate meteorological data[1]. With the hottest month in Seoul being August, June’s heat is notable but not yet at peak seasonal intensity, tempering expectations for record-breaking highs[3]. The market’s low probability reflects this balance between rising temperatures and historical seasonal limits.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Political prediction markets differ structurally from sports betting: thinner liquidity, longer settlement windows, higher sensitivity to single news events. This page shows the live Polymarket quote for Highest temperature in Seoul on June 20? plus platform attributes for the three reference venues, so you can see at a glance where the deepest market for this question sits.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

FAQ

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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.

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