Highest temperature in Hong Kong on June 25?

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Market context

On 25 June 2026, Hong Kong will face its peak summer heat, with the Hong Kong Observatory set to record the day’s absolute maximum temperature in degrees Celsius. Current crowd-implied probability of 0% for any specific range suggests the market expects an unusually low or uncertain outcome, yet historical patterns indicate June typically sees daytime highs around 30°C, often climbing higher under above-normal temperature forecasts [1][2]. Recent precedent shows Hong Kong hit 34.6°C on 20 June 2026—the hottest day of the year so far—prompting hail warnings and extreme heat alerts [8]. This mirrors Eurovision’s 50/50 jury and televote split, where public sentiment and expert data must converge to resolve uncertainty; similarly, traders must weigh long-term averages against real-time anomalies to interpret the 0% probability correctly.

Traders should monitor the Hong Kong Observatory’s daily extract releases, which finalize the “Absolute Daily Max” data after 25 June, as resolution cannot occur until this is published [market description]. Key catalysts include upcoming ENSO status updates and climate model revisions, which the Observatory cites as drivers for the expected above-normal temperatures in June–August 2026 [2]. Recent news from the South China Morning Post confirms extreme heat is already affecting the region, with temperatures soaring past 34°C and triggering weather warnings [8]. Cultural momentum around Hong Kong’s summer heat narratives—often amplified by social media and local weather alerts—adds pressure on the market to align with observed extremes rather than theoretical ranges. Watch for official announcements on heatwave advisories, as these directly influence the final recorded maximum.

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 PolyGram, 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 PolyGram, 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.

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.

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.