Highest temperature in Shenzhen on July 31?

Platform comparison

Market context

Shenzhen Bao’an International Airport is in peak summer heat, and the market is a bet on the day’s single highest air temperature recorded there, not the full-day mean. With the crowd at **0% YES**, the market is pricing the upper range as effectively out of reach, so the live consensus sits firmly on a cooler outcome; any value on the YES side would need a genuine heat spike above the usual July band.

History does not make that impossible. Shenzhen’s July climate is hot and humid, with long-run averages around the low 30s Celsius and typical late-July highs in the 30–34°C zone, while published July records have reached the mid-30s Celsius[1][8]. That means the favourite remains the lower temperature bands, but the underdog case is a one-day surge into the high 30s if conditions line up. From a handicapper’s angle, the market’s 0% implied probability looks aggressive unless the contract’s temperature bands are set very low relative to historical extremes.

The main catalysts are local weather drivers rather than scheduled announcements: monsoon moisture, cloud cover, rainfall timing and any passing tropical disturbance can suppress the airport’s maximum, while a dry, sunny afternoon can push it towards the top end of the historical range. Traders should watch Shenzhen airport observations on Wunderground through the day, alongside official forecasts and any warnings from China’s meteorological service; the airport station is the settlement source, so the late-morning to early-afternoon trend matters most for whether the day’s high can break out or stay trapped in the consensus band[16][11].

Sources: 1 · 2 · 3 · 4 · 5

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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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.

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.

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.