Highest temperature in Hong Kong on June 27?

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Market context

Hong Kong is entering its peak summer period on 27 June 2026, with the Hong Kong Observatory forecasting above-normal temperatures for the June–August season and current daily highs already reaching 32°C in the preceding days[2][4]. Historical data shows June typically averages 31°C, while July and August often climb to 32°C or higher, making a record-breaking heatday plausible despite the crowd-implied 0% probability for the highest temperature range[1][5]. Comparable cases from recent years, including an exceptionally warm February 2026 that was 3.0°C above normal, demonstrate the region’s susceptibility to significant temperature anomalies driven by ENSO conditions and climate model shifts[2][8].

Traders should monitor the Hong Kong Observatory’s finalised “Daily Extract” for the absolute daily maximum temperature, which will be published only after data for 27 June is confirmed[1]. Key catalysts include real-time weather updates showing sea surface temperatures at North Point (26°C) and soil temperatures near the Observatory (29.4°C at 0.5m depth), which can amplify daytime heating[3]. Any sudden shifts in rainfall—currently forecast at 60% chance with 88% humidity—could suppress peak temperatures, but the prevailing above-normal temperature trend suggests limited cooling potential[2][4]. The resolution hinges entirely on the Observatory’s official “Absolute Daily Max (deg. C)” once the Daily Extract is released.

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

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram 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.