Highest temperature in Seoul on June 20?

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Market context

On the weather side, the key event is the highest temperature recorded at Incheon International Airport in Seoul on 20 June, with settlement tied to the day’s top reading rather than a forecast endpoint. June in South Korea is usually early summer: Seoul commonly sees daytime temperatures around 19 to 28°C, with humidity rising and rain becoming more frequent as the month progresses, while the broader monsoon period often starts towards late June.[1][2][3]

A **2% YES** price implies the market is leaning strongly towards a relatively cool outcome by seasonal standards, not a standout heat event. Comparable June climate data for Seoul shows the warmest days in the month are typically in the high 20s, with the average warmest day around 28.1°C, which means a very high settlement band would normally require an unusually strong warming spike rather than ordinary early-summer weather.[8][1] That low implied probability is consistent with the view that the distribution is centred on moderate warmth, with only a small tail risk of a hotter-than-normal afternoon.

For traders, the main catalyst is the short-range temperature trend into the airport’s official observation window, including whether a warm, dry spell can build before cloud and rain increase later in the day.[6][3] The practical watchpoints are the Korea Meteorological Administration’s short-term forecasts and any sign of stronger-than-expected southerly warmth, since June conditions can shift quickly from comfortable to humid and unstable as the rainy season approaches.[6][4]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Seoul on June 20? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. Election Predictions UK routes every trade through to Polymarket — at 0% fees.

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

Where can I trade this market with the lowest fees?

On Election Predictions UK, 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?

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 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.

Do I need to KYC for this market?

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