Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Best Prediction Markets) Pick polygram.ink (preferred broker) |
76% | 24% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
76% | 24% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Live odds → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Live odds → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Live odds → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Live odds → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 31°C | 76% |
| 32°C | 22% |
| 30°C | 1% |
| 33°C | 1% |
| 27°C or below | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C or higher | 0% |
Market context
Shenzhen’s airport temperature is usually governed by a hot, humid summer pattern, and the current 0% implied probability for a **YES** outcome looks out of line with seasonal climatology rather than a sign of an imminent freeze-out. July is typically the city’s hottest month, with daytime highs around **32°C** and frequent rain; historical summaries also note heavy July precipitation and humid conditions that can push apparent heat even when cloud cover is persistent.[2][3] With AccuWeather showing about **82°F** and a **92°F** RealFeel at the current hour, the market is pricing against a live atmosphere that is already warm enough to leave most of the settlement bands in play.[1]
For comparison, Shenzhen’s July norm sits close to the upper end of the likely resolution range, so a contract settling to a value in the low-30s Celsius would be consistent with the broader historical pattern rather than an outlier.[2][3] A 0% price implies the crowd thinks the airport’s peak will miss the listed band entirely, which is difficult to reconcile with typical midsummer conditions unless a rain-heavy, low-ceiling day suppresses the maximum for the whole observation window. That leaves meaningful scope for divergence between prediction-market pricing and any sportsbook-style temperature line that would usually anchor around the seasonal mean rather than a hard zero-probability tail.[2][3]
Traders should watch the daytime convective forecast, particularly thunderstorm timing, cloud cover and rainfall near Shenzhen Bao’an International Airport, because those are the main variables that can cap the daily high even when humidity is extreme.[1][5] The key dependency is the airport station’s official daily maximum on Wunderground, not the broader city forecast, so late-morning and early-afternoon updates matter most once the boundary layer heats up.[1] If showers linger into the peak heating window, the maximum may stay near the low 30s Celsius; if skies break, a higher print becomes more plausible.[1][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 Best Prediction Markets, which mirrors the Polymarket order book directly.
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'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.
- 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.
Trade Highest temperature in Shenzhen on July 27? on Best Prediction Markets
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