Highest temperature in Beijing on July 25?

Platform comparison

Market context

Beijing's peak temperature on 25 July 2026 will be recorded at the Capital International Airport Station and resolved against historical weather data. July is consistently the hottest month in Beijing, with average highs around 29–30°C, though extreme heat events regularly push readings above 35°C. The 0% crowd-implied probability suggests traders are either uncertain about the specific temperature bands offered or treating this as a placeholder market awaiting clearer resolution criteria.

Historical July data from Beijing shows considerable year-to-year volatility. In 2023, the city experienced a severe heatwave with temperatures exceeding 40°C on multiple days; in 2022, July peaks averaged closer to 32°C. The 30-year climate normal for late July sits around 29°C, but outlier years demonstrate the range extends from low 20s during cooler summers to well above 35°C during heat-driven patterns. Traders should reference Wunderground's historical archive for the Beijing Capital International Airport Station to calibrate expectations against recent summers and longer-term patterns.

The key variable affecting July 2026 temperatures will be the East Asian summer monsoon intensity and any Pacific high-pressure systems that might establish over northern China. Climate forecasts issued in spring 2026 will provide directional guidance on seasonal temperature anomalies, though sub-monthly prediction skill remains limited. El Niño or La Niña conditions developing through early 2026 could influence monsoon behaviour. Traders should monitor China Meteorological Administration seasonal outlooks and any heat-wave watches issued in late June 2026, which would sharpen probability estimates closer to the resolution window.

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.

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. 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.

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.

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 trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.