Highest temperature in Hong Kong on June 25?

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Market context

On 25 June 2026, Hong Kong will face its peak daytime heat, with the Hong Kong Observatory recording the highest temperature in degrees Celsius for that day. In prediction markets, a "YES" share pays out £1 if the chosen outcome occurs, while a "NO" share pays out £1 if it does not; traders can sell either before resolution to lock in profits or cut losses. This specific market resolves to the temperature range containing that daily maximum, with the crowd currently assigning an 84% probability to 32°C as the frontrunner, despite the prompt noting a 0% chance for a lower threshold.

Historical June data frames this high probability, as the highest monthly mean maximum temperature recorded in Hong Kong was 32.4°C in June 2016, followed closely by 32.3°C in 2015 [4]. Recent events reinforce this trend, with the Observatory recording 34.6°C on the hottest "Mangzhong" day of the year, marking a historic peak before a shift to severe weather [3]. While that extreme heat is giving way to a nine-day downpour expected to cool temperatures to 26–30°C by Sunday, the specific date of 25 June sits just before this relief, keeping the likelihood of temperatures near or above 32°C strong.

Traders should monitor the Hong Kong Observatory's "Daily Extract" for the finalized "Absolute Daily Max" figure, as the market cannot resolve until this data is officially published [3]. The primary catalyst is the arrival of the low-pressure trough bringing squally thunderstorms and hail, which the Observatory warns will peak on Sunday and Monday, potentially lowering temperatures significantly if the weather system accelerates [3]. A recent report from The Standard confirms that while the city sweltered through record heat, the active weather system is poised to deliver heavy showers that will alleviate the intense warmth, making the timing of the 25 June maximum critical for the outcome [3].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Hong Kong on June 25? across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Prediction Market UK — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

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 Prediction Market 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 Prediction Market UK?

Zero. Prediction Market 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.