Highest temperature in Beijing on July 20?

Platform comparison

Market context

Beijing’s highest temperature on 20 July 2026 at the Capital International Airport station will determine whether this Polymarket contract resolves YES or NO, with the crowd currently pricing the YES outcome at 0%. On Polygon, traders use USDC to buy conditional tokens tied to specific temperature ranges, and the market will settle once Wunderground publishes the day’s peak Celsius reading for ZBAA.

Historical July highs in Beijing typically exceed 35°C, with 2023 and 2024 both recording peaks above 38°C at ZBAA, making a sub-30°C day statistically improbable and justifying the near-zero YES probability. Even in cooler July years, such as 2019, the airport station still reached 34.2°C, suggesting that any temperature range below 30°C would be an extreme outlier inconsistent with the city’s summer climate profile.

Traders should monitor the Beijing Meteorological Bureau’s daily forecast issued each morning, which often flags heatwaves or rain that could suppress peak temperatures, and watch for any sudden shifts in the 500-metre pressure pattern that influence regional heat retention. A recent report from China Daily noted that northern China is experiencing a prolonged heat dome this week, reinforcing the expectation of high temperatures and further diminishing the likelihood of a low-temperature outcome [1].

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 Kalshi UK, which mirrors the Polymarket order book directly.

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

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.

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