Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Scam?) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Place a position → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Place a position → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Place a position → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Place a position → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Place a position → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 33°C | 100% |
| 26°C or below | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 32°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C or higher | 0% |
Market context
Polymarket is pricing this Shenzhen airport temperature contract at **0% YES** right now, even though the settlement depends on the highest reading at Shenzhen Bao'an International Airport Station on 22 July and is still open until the noon UTC resolution window closes. On Polymarket, that price reflects the market’s current view of the chance that the day’s maximum lands in the contract’s YES range, with traders posting bids and offers in USDC on Polygon and the market settling via conditional tokens against the Wunderground historical record.
For context, Shenzhen’s July climate is typically hot and very humid: average daily highs are about **31°C** and lows about **27°C**, with humidity around **82%**.[2] Current conditions in Shenzhen are already warm, with AccuWeather showing **82°F** and a RealFeel of **91°F**, which fits the city’s normal summer profile rather than an extreme cool spell.[1] That means the market’s near-zero price is less about an absence of heat and more about where the day’s peak ends up relative to the contract’s temperature bands.
The main catalysts to watch are the airport’s actual midday-to-afternoon heating pattern, cloud cover, rainfall, and any monsoon-style bursts that can cap the high before it reaches the upper bands. For a user holding positions, the practical dependency is simple: the settlement source is the Wunderground daily history page for Shenzhen Bao'an International Airport Station, so the only thing that matters is the reported maximum for the full day once data are posted. If the afternoon stays clear and humid rather than stormy, the realised high can still move sharply even when the market has already anchored at zero.
Methodology
This page reviews Highest temperature in Shenzhen on July 22? 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 Polymarket Scam?, which mirrors the Polymarket order book at 0% fees.
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
- 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.
- 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 Polymarket Scam? 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.
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