Highest temperature in Beijing on July 24?

Platform comparison

Market context

Beijing’s airport high is being priced as a **light favourite to land in the upper-20s or low-30s Celsius**, with the crowd currently putting **29°C** at 28% and **30°C** at 24%, which leaves the 0% YES quote looking like a clear *underdog* on the listed outcome set.[1] For a July afternoon in Beijing, that is not an aggressive call: July is the city’s hottest month, with typical highs around **31°C** and frequent rain that can suppress the daily maximum if cloud and showers arrive early.[2]

The historical frame is that Beijing’s July heat profile often centres around the low 30s, but precipitation introduces a useful contrarian angle because a wetter forecast can flatten the top end and make the mid-to-high 20s more competitive than the weather-normal suggests.[2] The market’s consensus is therefore fairly straightforward: traders are leaning towards a warm but not extreme day, rather than a standout heat spike, so the value case depends on whether the final forecast trends dry and sunny enough to push the airport reading above the consensus band.[2]

For catalysts, the key inputs are the live forecast updates for Beijing Capital International Airport, especially cloud cover, afternoon convection and any rain timing, because the settlement is based on the **highest temperature recorded at the station on 24 July** rather than a citywide average.[1] The practical trade watch is whether the day can fully realise its warming window before showers or thick cloud arrive; if the morning starts benign and the midday forecast remains dry, the higher brackets become more attractive, but if rain risk rises, the favourite shifts back towards the cooler middle outcomes.[2]

Sources: 1 · 2 · 3

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 Who Will Win, 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 Who Will Win. 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.

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.