Highest temperature in Beijing on July 21?

Platform comparison

Market context

Beijing's daily maximum temperature on 21 July 2026 will be recorded at the Capital International Airport Station and resolved against historical Weather Underground data. July represents the height of Beijing's summer monsoon season, when daily highs typically range between 29–35°C, though extreme heat events can push readings above 37°C. The settlement mechanism relies on a single authoritative source—Wunderground's historical archive for station ZBAA—making this market suitable for automated resolution workflows that can query the API directly rather than relying on manual verification.

The 0% crowd probability reflects genuine uncertainty rather than consensus bearishness. Beijing's July temperatures exhibit substantial year-to-year variance: the city recorded 40.6°C in June 2022 during an exceptional heatwave, whilst cooler monsoon patterns have kept July maxima below 32°C in other years. Comparable markets on extreme heat events in East Asia show traders typically price in a 15–25% probability for readings exceeding 37°C during peak summer months, suggesting current pricing may underweight tail-risk scenarios. Historical data from the China Meteorological Administration indicates that roughly one July in five experiences at least one day above 36°C in Beijing.

Traders monitoring this market should track seasonal forecasts from the National Climate Center and real-time atmospheric patterns in late June 2026. The Tibetan high-pressure system's positioning in early July will be the primary driver of whether subtropical air masses dominate the region. Automated conditional orders could be structured to adjust positions based on 10-day ensemble forecasts published by the European Centre for Medium-Range Weather Forecasts, which typically show skill for temperature extremes 7–10 days ahead.

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

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 Polymarket Bot 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.