Highest temperature in Hong Kong on August 15?

Platform comparison

Market context

On 15 August 2026, the Hong Kong Observatory will record a daily maximum temperature in Celsius, and this market settles to whichever temperature band contains that reading. Polymarket currently prices all outcome ranges at 0% implied probability, reflecting the contract's distance from settlement and the absence of forward-looking temperature forecasts at this horizon. Once the Observatory publishes its "Absolute Daily Max" figure in the Daily Extract dataset, conditional tokens representing each temperature band will resolve to either full value or zero.

Hong Kong's August temperatures cluster tightly around historical norms. The Observatory's records show August daily maxima typically range between 31°C and 34°C, with extreme readings above 35°C occurring in roughly one year per decade during particularly intense heat waves. The 1998 heat wave produced readings near 37°C, whilst cooler Augusts have bottomed around 29°C. These historical bounds establish the realistic outcome space; the current 0% pricing reflects only that no trader has yet committed capital to any specific band rather than suggesting any outcome is impossible.

The Hong Kong Observatory updates its climate data monthly, with August 2026 figures finalised by early September. Traders should monitor the Observatory's website for publication timing, as the market cannot settle until the official reading appears in the Daily Extract. Regional weather patterns in summer 2026—particularly the strength of the Pacific anticyclone and any tropical cyclone activity—will determine the actual outcome, but these drivers remain unknowable at present. Settlement depends entirely on Observatory data availability and accuracy.

Methodology

This page reviews Highest temperature in Hong Kong on August 15? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

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.

UK Frequently Asked Questions

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is PolyGram. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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%.