Highest temperature in Shenzhen on July 31?

Platform comparison

Market context

The event here is the **highest temperature recorded at Shenzhen Bao'an International Airport on 31 July 2026**, using the Wunderground station history page for Shenzhen/ZGSZ. In prediction markets, a **YES** share pays out if the stated outcome happens; a **NO** share pays out if it does not, so the current **0% YES** implies the crowd is effectively pricing this as an outside result.

July in Shenzhen is normally hot and humid, with long-run summaries putting average highs around **31°C to 32°C** and record highs in the **mid-30s Celsius** rather than extreme heat far above that range.[1][18][20] That context matters because this market is not asking whether the day is warm, but whether the airport’s observed maximum lands in the settlement band chosen by the market. A 0% YES price usually signals either a narrow settlement band, a timing issue, or that traders think the relevant reading is unlikely to hit the required threshold.

For traders, the key catalysts are the day’s weather evolution and the timing of the Wunderground daily high update, not a scheduled announcement. Shenzhen’s late-July climate is dominated by monsoon moisture and convective showers, so cloud cover and rainfall can cap daytime heating, while brief sunny intervals can still push the maximum up quickly.[15][18] The market settles on the airport station’s published daily maximum, so the critical dependency is the final recorded temperature for the full day rather than any forecast from earlier in the morning.[16]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page reviews Highest temperature in Shenzhen on July 31? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Prediction Market UK, which mirrors the Polymarket order book at 0% fees.

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 Prediction Market 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.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Prediction Market 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.