Highest temperature in Hong Kong on August 13?

Platform comparison

Market context

On 13 August 2026, the Hong Kong Observatory will record the day's highest temperature in degrees Celsius. Polymarket currently prices this contract at 0% YES, reflecting the market's assessment that the settlement window—closing at 12:00 UTC on that date—leaves insufficient time for traders to act on confirmed data. The Observatory publishes daily temperature extracts with a lag; the "Absolute Daily Max" figure typically appears within 24 hours of the observation period, well after the market's close. This timing mismatch creates a structural disadvantage for YES positions, since resolution depends on official publication rather than real-time observation.

Hong Kong's August temperatures cluster reliably between 32 and 35°C, with extreme heat events (above 36°C) occurring roughly once per decade. The city's record August daily maximum stands at 36.6°C, set in 2015. Historical volatility suggests most August 13th outcomes will fall within the 33–35°C range, yet the 0% pricing implies traders are discounting even the highest temperature brackets entirely—a reflection of the settlement timing problem rather than meteorological improbability.

The key variable is whether the Hong Kong Observatory publishes its daily extract before the market closes. Traders monitoring the Observatory's website and recent publication schedules will have the clearest picture of whether resolution is feasible. Seasonal weather patterns favour high temperatures in mid-August, but without confirmed data availability before 12:00 UTC, the contract's mechanics favour NO positions by default.

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Polymarket Scam?. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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%.