Highest temperature in Beijing on July 12?

Platform comparison

Market context

Beijing is currently experiencing peak summer heat as the settlement window for the July 12 temperature market closes today at noon UTC. The contract resolves based on the highest Celsius reading at Beijing Capital International Airport, with the crowd assigning a 0% probability to the YES outcome, implying traders believe the temperature will fall outside the specific range offered. This stark pricing suggests a consensus that the day’s peak heat will not breach the threshold, despite the region’s reputation for extreme July conditions.

Historical data frames this zero-percentage line as a cautious bet against a potential record breaker. In 2023, Beijing’s July peak reached 40°C, and recent years have seen unprecedented heat waves sweeping the North China Plain, with temperatures frequently exceeding 35°C across large parts of the country[1][7]. While average daily highs in July typically hover around 31°C (88°F), rarely exceeding 36°C (96°F), the 2024 record for the hottest month in recent history indicates that extreme outliers are becoming more common[2][9]. The current odds diverge significantly from the physical reality of Beijing’s summer volatility, where a single intense heat dome can shatter previous records.

Traders monitoring similar cross-platform weather contracts should watch for real-time updates from Wunderground, the designated resolution source, which will publish the final airport station reading immediately after the settlement window closes. Recent reports confirm an intensifying heat dome is driving maximums toward 37°C or higher on early July dates, suggesting the atmospheric setup remains volatile[10]. With China officially recording its hottest July month in recent history, the lack of positive implied probability on this specific date appears to ignore the broader trend of escalating summer temperatures in the capital[9]. The divergence between the 0% market price and the historical likelihood of 40°C peaks in July presents a notable anomaly for comparison-focused analysis.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Beijing on July 12? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

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.

FAQ

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 Best Prediction Markets UK. 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.