Highest temperature in Beijing on August 12?

Platform comparison

Market context

Beijing's highest temperature on 12 August 2026 will be measured at the Capital International Airport Station and recorded in Weather Underground's Daily Observations table, with settlement determined by whichever temperature range contains that single peak reading in degrees Celsius. The current market pricing reflects zero probability across all temperature brackets, an unusual state that typically indicates either insufficient liquidity or traders awaiting clearer atmospheric forecasting as the date approaches.

Historical August temperatures in Beijing cluster between 25–34°C at their daily highs, with extreme readings occasionally reaching 36–38°C during heat waves driven by Tibetan anticyclones. The 2010 heat wave produced readings near 40°C, whilst more recent summers (2020–2024) have seen peaks in the 32–35°C range become standard. August typically marks the tail end of Beijing's monsoon season, introducing variability; early-month readings tend toward the upper 30s before potential cooling mid-month. Current market pricing at 0% across all brackets suggests traders are either discounting the market's liquidity or waiting for seasonal forecasts from China's Meteorological Administration, which typically issue extended outlooks in late July.

Traders should monitor the China Meteorological Administration's monthly forecast release (expected late July 2026) and track any El Niño or La Niña signals from the preceding months, as these influence East Asian summer patterns. Real-time atmospheric pressure systems and subtropical high-pressure positioning in early August will be critical; the specific timing of any monsoon trough passage could shift daily maxima by several degrees. Weather Underground's station data feeds continuously, making the resolution source transparent but dependent on sensor calibration and maintenance at Beijing Capital International Airport.

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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.

What's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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%.