Highest temperature in Seoul on June 22?

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Market context

The key real-world event is the **highest temperature at Incheon International Airport Station** on 22 June, measured in Celsius and settled from Weather Underground’s daily history page, which means traders need to care about the single daily maximum rather than any average, overnight low, or citywide impression. The market currently sits at **0% YES**, but the contract’s own display shows the crowd’s live price action elsewhere has been concentrated around a mid-20s Celsius outcome, with 26°C the main frontrunner and 25°C next, which is more consistent with a warm summer afternoon than an extreme-heat spike.[1]

For framing, Seoul’s June climatology normally trends from the high 20s Celsius into the low 30s Fahrenheit-equivalent band; Weather Spark puts average June highs in Seoul around 77°F to 81°F, with the hottest days rarely exceeding 87°F, so a maximum in the mid-20s Celsius is historically plausible even before you factor in local marine influence near Incheon.[2] A programmatic trader would usually model this market as a range-selection problem against a forecast distribution: ingest the station forecast, compare it with prior June outcomes, and map the expected maximum into the market’s discrete temperature buckets, rather than treating it as a simple up/down event.

The main catalysts are the day’s short-range forecast updates, any wind shift that brings cooler sea air off the Yellow Sea, and whether cloud cover or rain suppresses afternoon heating; those factors matter more than broad seasonal averages because the settlement window closes at noon UTC, which captures the local afternoon peak in South Korea. Longer-run context still matters: Korean heat extremes have been trending higher in recent years, with Weather Underground noting the country’s all-time heat record and reporting severe summer records, but that backdrop is only useful if the synoptic setup on the day supports it.[4][8]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). The odds column is filled only where we have clean data — that avoids the made-up numbers that get a network demoted when search engines cross-check against the source venue.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket Review 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?

Polymarket Review 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.

What does it cost to trade on Polymarket Review UK?

Zero. Polymarket Review 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, Polymarket Review UK triggers a quick verification flow that finishes in minutes.

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.