Highest temperature in Hong Kong on August 14?

Platform comparison

Market context

Polymarket currently prices this Hong Kong temperature contract at **0% YES**, so the market is treating a qualifying daily high as effectively certain to land outside the relevant range, even though the on-chain outcome will only be fixed once the Hong Kong Observatory publishes the final “Absolute Daily Max” for 14 August 2026. Because settlement runs through conditional tokens on Polygon and pays in USDC, the main practical point for users is that the contract can sit near zero for most of the day and still reprice sharply if the Observatory’s final extract lands in a range that traders have underweighted.

For context, Hong Kong’s August climate is normally hot: the Observatory’s climatological page shows a mean maximum of **31.4°C** and a mean temperature of **28.8°C**, while other historical August summaries cluster around maximums near 31°C. That matters because this market is not asking whether Hong Kong is warm in general, but where the single-day peak falls after finalisation; recent August weather reports from the Observatory have also shown extended hot spells, including an “exceptionally hot August” in 2024, which is the kind of comparable case traders typically use to gauge whether the upper bands are realistically in play.[14][11][13]

The key catalyst is the Hong Kong Observatory’s daily extract publication, because this market cannot resolve until the finalised data for the date is posted on its climatology pages.[3][14] Traders should also watch for any Observatory updates on heat warnings, as these affect the intraday temperature path but not the final settlement source; the contract resolves strictly from the Observatory’s recorded maximum in Celsius, to one decimal place, rather than from live app estimates or third-party forecasts.[3][14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket Scam?, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

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Is this market available outside the US?

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Polymarket is accessible to UK traders but is not UKGC-licensed. It operates under US CFTC jurisdiction. UK residents face no domestic legal prohibition on using it, but UKGC consumer protections do not apply. For UKGC-regulated alternatives, Betfair Exchange and Smarkets offer similar prediction-style markets.

Do I pay tax on prediction market profits in the UK?

UKGC-licensed platform profits (Betfair, Smarkets) are typically tax-free gambling winnings for UK individuals. Polymarket profits involve USDC crypto transactions, which HMRC treats as Capital Gains Tax events. Keep full transaction records and report via Self Assessment if gains exceed £3,000 per tax year.

How do I deposit on Polymarket from the UK?

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