Highest temperature in Beijing on August 16?

Platform comparison

Market context

Beijing's highest temperature on 16 August 2026 will be measured at Capital International Airport Station and resolved against Weather Underground's Daily Observations table. The current crowd-implied probability of 0% suggests traders are pricing this as either a settled outcome or reflecting extreme confidence in a specific temperature range already established elsewhere on the platform. This market structure relies on a single authoritative source—the granular Daily Observations data rather than summary high-low figures—which eliminates ambiguity but requires precise tracking of intraday readings.

August temperatures in Beijing historically cluster between 25–32°C, with extremes occasionally reaching 35°C during heat waves. The 2010 heat wave saw the city record 40.6°C, though such events remain statistically rare. Recent summers have shown volatility: August 2023 peaked at 34.1°C, whilst August 2022 reached 35.8°C. The 0% probability currently displayed suggests either that the market has already resolved to a specific range with certainty, or that traders have concentrated positions in a single outcome, leaving other brackets unpriced.

Traders monitoring this contract should track China Meteorological Administration forecasts released in early August 2026, which typically provide 10-day outlooks with reasonable accuracy for Beijing. Seasonal patterns matter: late August often sees the tail end of summer heat before autumn cooling begins, though typhoon activity from the Pacific can introduce unpredictability. The settlement window closes at noon UTC on 16 August, meaning real-time temperature readings from the airport station will determine resolution during what is typically Beijing's warmest part of the day.

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

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.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

What are the best prediction markets for UK traders in 2026?

For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.