Highest temperature in Seoul on June 23?

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Market context

The underlying event is the peak daily temperature recorded at Incheon International Airport on 23 June 2026, which will determine the settlement of this prediction market. Current crowd-implied probability sits at 0% for the highest range, suggesting traders expect conditions well below extreme heat thresholds. Historical data for Seoul in June shows daily highs typically increasing from 77°F to 81°F, rarely exceeding 87°F, with average solar energy gradually declining through the month[1]. Recent records confirm South Korea’s all-time heat peak reached 41.0°C in Hongcheon, but Seoul itself has only occasionally hit 35°C, with a notable 37.7°C recorded in early July 2026—the highest in 117 years[2][5][8]. Just days prior, on 19 June 2026, Seoul reached 91°F (approximately 32.8°C), indicating current warmth is consistent with mid-range expectations rather than outlier extremes[3].

Traders should monitor upcoming weather forecasts and any official climate declarations from the Korea Meteorological Administration, as sudden shifts in monsoon patterns or heatwave advisories could alter temperature trajectories. The market is leaning on the absence of a declared heatwave or extreme temperature alert, which would typically drive prices toward higher ranges. AccuWeather’s June 2026 forecast for Seoul projects daily highs between 83° and 89°F, with an average high of 86°F, reinforcing the likelihood of moderate conditions[6]. No scheduled political debates, campaign-finance disclosures, or conventions are expected to influence weather outcomes directly, but any government-issued climate emergency declarations would serve as a critical catalyst. Monitoring Wunderground’s real-time updates for Incheon will be essential, as this station’s data is the official resolution source[2]. The lack of extreme heat signals in recent days supports the current 0% probability for the highest range.

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 23? 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

Is this market available outside the US?

Election Predictions UK 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.

What does it cost to trade on Election Predictions UK?

Zero. Election Predictions UK 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.