Highest temperature in Shenzhen on August 5?

Platform comparison

Market context

Shenzhen’s **highest temperature on 5 August** is the settlement point, measured at Shenzhen Bao’an International Airport Station and matched to the Wunderground daily high. With the market currently at **0% YES**, the crowd is effectively pricing in an outcome that has no meaningful live bid yet, which is unusual for a summer heat event in a humid southern China city where daytime highs often sit in the low 30s Celsius.[16][9][19]

The comparison set matters because August climatology for Shenzhen is already warm: travel and weather sources put typical August highs around **31–33°C**, with some outlooks for 5 August clustering near **31°C to 33°C** and rain in the background.[2][9][19] Polymarket’s own ladder currently has **32°C** as the frontrunner at **38%**, with **31°C** next at **22%**, which points to a market expectation well above the 0% headline probability and suggests the displayed crowd price is either stale or not yet reflecting the same contract view as the platform’s outcome page.[16] On a cross-platform basis, sportsbook-style weather pricing is not broadly available here, so the main comparison is between the exchange line, the platform-implied distribution, and the climatological mean rather than a direct bookmaker quote.

The main catalysts are the evolving day-of forecast, radar updates, and whether showers or thunderstorms suppress the afternoon peak. Shenzhen’s forecast pages show a humid, unsettled August pattern with rain chances and occasional thunder, but also periods of strong heat and high humidity that can still allow mid-30s readings if cloud cover breaks.[8][12][18] Traders should watch the airport station’s midday progression, because the contract settles on the **highest observed reading** before the 12:00 UTC cutoff, so an early morning 0% can change quickly if the day turns brighter than expected.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Shenzhen on August 5? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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 PolyGram. 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 PolyGram 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.