Highest temperature in Hong Kong on August 5?

Platform comparison

Market context

Hong Kong’s temperature on 5 August will be settled on the Hong Kong Observatory’s final **Absolute Daily Max** for that date, and the market is now focused on whether the city can again push into the mid-30s Celsius. The HKO’s own climate normals put 5 August’s average maximum at **31.4C**, which frames anything materially above that as a warm-day outcome rather than an outlier in an August heat spell.[3]

Past cases suggest the upper bands are very live when a strong ridge sits over southern China. On 5 August 2024, local reporting said the Observatory reached **35.4C**, setting the year’s high at the time, while the HKO later described 3–9 August 2024 as “persistently very hot”, with 5 August the peak day of that run.[2][1] More broadly, Hong Kong’s recent summers have repeatedly delivered record-breaking heat, including the city’s hottest summer on record in 2023, so a market at 0% YES looks detached from the historical distribution if the forecast window is clear and settled.[12]

The main catalysts are the short-range HKO advisories, the morning and afternoon temperature trend, and whether any cloud, rain, or thunderstorm system interrupts daytime heating before the official daily maximum is locked in. HKO’s hourly readings on 5 August already showed a warm, humid start in the high-20s, which leaves room for a higher afternoon peak if skies stay bright and winds remain light.[9] Traders should also watch for any special weather bulletin or tropical disturbance affecting southern China, as August in Hong Kong remains a month when intense heat and unstable weather can coexist.[10][16]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Hong Kong on August 5?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

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Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

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