Highest temperature in Seoul on June 21?

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Market context

The day’s outcome depends on the highest temperature logged at Incheon Intl Airport Station, not the feel of Seoul city centre, so the key question is whether the airport’s official daily maximum lands inside the market’s Celsius band. June in Seoul is typically warm rather than extreme, with long daylight hours, average daytime highs around 26°C, and a common range of roughly 19°C to 28°C; late June also marks the build-up into the monsoon period, which can dampen afternoon heat even as humidity rises.[1][2][3]

A 0% implied probability is consistent with the market’s wording being unusually specific: it references a single station, a single calendar day, and a highest-temperature reading taken from Wunderground’s historical daily record. Comparable June climatology suggests the odds should be read against a fairly broad but seasonal distribution, not against July–August heat extremes, and the airport location can differ from central Seoul because coastal and suburban stations often run slightly cooler or warmer than downtown readings.[1][2][7] For access, “no-KYC up to $1,500” means a trader can usually participate below that threshold without submitting identity documents, but higher deposits or withdrawals may trigger verification; in practice that affects onboarding, not the meteorological resolution itself.

The main catalysts are the Korea Meteorological Administration’s short-range updates, any shift in the regional forecast for heat, cloud cover or rain, and the actual Wunderground station readout as the day progresses, because a late spike can change the final maximum.[6] From a regulatory angle, German GlüStV rules can make access to gambling-like products more restricted for users in Germany, while the US CFTC’s jurisdictional reach remains relevant for any US-facing activity involving commodity-linked event contracts, even when the underlying event is weather rather than a financial asset.

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 Polymarket KYC UK, which mirrors the Polymarket order book directly.

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 KYC 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.

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 Polymarket KYC UK?

Zero. Polymarket KYC 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.

Do I need to KYC for this market?

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