Highest temperature in Shenzhen on July 22?

Platform comparison

Market context

A **YES** share pays out if the day’s highest temperature at Shenzhen Bao’an International Airport lands in the market’s specified Celsius range; a **NO** share pays out if it does not. The resolution point is the single observed daily maximum on 22 July 2026, taken from Wunderground for Shenzhen Bao’an International Airport Station, so traders are really pricing one airport reading rather than a citywide average or the afternoon forecast.[3]

The current 0% implied probability is best read as a market view that the target temperature band is not expected to be hit, rather than as a statement that the day will be cool. Live weather pages show Shenzhen Bao’an International Airport already in the mid-30s Celsius equivalent range this morning, with AccuWeather reporting 84°F and a “RealFeel” of 95°F, while Meteoblue’s forecast puts today’s maximum around 32–33°C with a minimum near 28°C.[1][3] That comparison is useful for new readers: prediction markets price the specific settlement rule, not just whether it feels hot.

The main catalysts are the day’s evolving airport temperature path, cloud cover, humidity, rain chances, and any change in wind or convection that could cap the maximum before the settlement window closes. Meteoblue currently shows a very high precipitation chance near 90% for Shenzhen Bao’an International Airport, which matters because heavy cloud and rain can suppress afternoon highs even after a warm start.[4] Since the market resolves off the airport station’s recorded maximum, traders will watch that single source closely rather than broader regional forecasts.[3]

Sources: 1 · 2 · 3 · 4

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

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

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 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.

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.