Highest temperature in Hong Kong on August 18?

Platform comparison

Market context

The Hong Kong Observatory will record the highest temperature in Hong Kong on 18 August 2026, measured to one decimal place in degrees Celsius. This single daily maximum reading will determine which temperature band resolves the market, with settlement dependent on the Observatory's official publication in its Daily Extract dataset.

Hong Kong's August temperatures are among the year's most consistent. Historical data from the Observatory shows daily maxima in mid-August typically range between 31°C and 34°C, with extremes rarely exceeding 35°C or falling below 30°C. The 0% crowd probability suggests traders expect the highest temperature to fall outside whatever upper threshold the market has defined—likely above 35°C or in a similarly elevated band. August is Hong Kong's hottest month, but such outlier readings occur infrequently; the Observatory's records indicate that temperatures above 36°C on any given August day occur roughly once per decade.

The key variable is tropical weather systems. Typhoon season peaks in August and September; a system tracking near Hong Kong in the days preceding 18 August could either suppress temperatures through cloud cover and rain or, if it passes sufficiently far offshore, allow intense heat to build. The Hong Kong Observatory issues typhoon warnings and forecasts five to seven days in advance, providing traders with actionable signals. Additionally, the Urban Heat Island effect means central Hong Kong readings can exceed New Territories measurements by 1–2°C on still, clear days. Settlement cannot occur until the Observatory publishes its Daily Extract for that date, typically within 48 hours of the observation period closing.

Methodology

Sports-specific comparison page for Highest temperature in Hong Kong on August 18?. 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.

Resolution & payout

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.

UK Frequently Asked Questions

Are prediction markets better than sports betting?

Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.

Can I bet on individual matches?

Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.

Is Polymarket legal in the UK?

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?

UK traders typically fund Polymarket via Coinbase UK, Kraken or Revolut — buying USDC with GBP and transferring to a Polygon-compatible wallet (MetaMask, Coinbase Wallet). Polymarket's onboarding walks you through the bridging process. Typical GBP-to-USDC conversion costs 0.5–1%.