Highest temperature in Hong Kong on June 20?

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Market context

The highest temperature recorded in Hong Kong on 20 June will be set by the Hong Kong Observatory’s daily extract, so the key question is whether the day reaches a clearly summer-like peak or stays capped by rain and cloud. The Observatory’s June–August outlook says temperatures are expected to be **above-normal** this season, which supports the idea of warm afternoons, but it does not by itself guarantee an extreme daily maximum.[1]

The current **0% YES** price implies the book is treating a qualifying outcome as very unlikely, which can happen in thin markets where on-ramp friction limits fresh risk capital. Where deposits are slower or more expensive, especially for users moving through card, Klarna, SEPA, or USDC rails, order books often stay shallow until larger funding flows arrive; that matters here because a weather market only becomes meaningfully priced once enough capital is on both sides to absorb late-day temperature updates. Hong Kong June climate references point to typical highs in the low 30s Celsius, so the relevant range is whether the Observatory posts an unusually hot reading above that seasonal baseline.[2][4]

Traders should watch the Observatory’s same-day updates, because the settlement source is the “Absolute Daily Max (deg. C)” in the relevant Daily Extract and the market cannot resolve until that publication is finalised. The live tourist-facing HKO feed already shows a hot, humid day with a maximum around 32°C and a high rain chance, which would normally make the final print hinge on whether sunshine breaks through long enough to lift the peak. If deposits are delayed or withdrawal rails are clunky, that can suppress intraday repricing even when the weather changes quickly, leaving the market more exposed to late liquidity than to the forecast itself.[3][8]

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 Deposit 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 Deposit 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'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 Polymarket Deposit UK?

Zero. Polymarket Deposit 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.