Highest temperature in Shenzhen on July 16?

Platform comparison

Market context

Shenzhen will experience its peak July heat today at the Bao’an International Airport Station, with the day’s highest temperature in degrees Celsius determining the outcome of this weather contract. The market currently prices the YES outcome at 0%, implying traders believe the temperature will fall outside the specified range, though July in this region typically sees highs between 32°C and 35°C.

Historical data from Wunderground shows that mid-July temperatures at ZGSZ have consistently exceeded 30°C since 2020, with 2023 and 2024 both recording peaks near 34°C. The current 0% probability appears misaligned with these comparable cases, suggesting either a narrow range definition or a temporary market inefficiency rather than a genuine expectation of cool weather.

Traders should monitor real-time updates on Wunderground’s daily history page for the Bao’an station, as settlement depends entirely on the highest recorded value before the 12:00 UTC deadline. No official weather announcements are expected to alter the reading, but sudden cloud cover or rain showers could suppress the peak temperature below the range threshold. The contract resolves on-chain using USDC on Polygon, with conditional tokens reflecting the final temperature bracket once the data is verified.

Methodology

We track Highest temperature in Shenzhen on July 16? 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

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 PolyGram. 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.

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 PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.