Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Best Prediction Markets UK) Pick polygram.ink (preferred broker) |
53% | 47% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | View on Polymarket → |
Polymarket (direct) polymarket.com |
53% | 47% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | View on Polymarket → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | View on Polymarket → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | View on Polymarket → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | View on Polymarket → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 33°C | 53% |
| 32°C | 43% |
| 34°C | 4% |
| 35°C | 1% |
| 28°C or below | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 31°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C or higher | 0% |
Market context
Shenzhen’s August heat is usually well into the low 30s Celsius, and the airport station’s daily high on 6 August is more likely to land in the **31–34C** band than to break far above it. August climatology for the city points to average highs around **31–32C**, while several forecast-style sources for early August cluster around **31–33C** with muggy, rain-affected conditions, which supports the market’s current lean away from an extreme outcome.[1][3][7][10][19] Against that backdrop, a **0% YES** crowd-implied probability is consistent with a market that is effectively pricing the contract as a normal-summer temperature print rather than a standout hot day.
For comparison, sportsbook-style weather lines and forecast aggregators are also centred near the low 30s Celsius, with one source showing about **32C** for 6 August and another indicating **33C** as the daily high, while broader month forecasts stay inside roughly **27–34C**.[7][10][15] That leaves little room for a material disagreement between platforms: the main question is not whether Shenzhen will be hot, but whether the airport’s recorded maximum pushes into the top end of the range used by this contract. Traders should watch the airport observation feed on Wunderground closely, because this market resolves off the **highest temperature recorded at Shenzhen Bao'an International Airport Station** on the day, so brief afternoon spikes, thunderstorm outflows, or delayed reporting can matter more than the headline city forecast.[14][20]
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 UK, which mirrors the Polymarket order book directly.
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.
UK Frequently Asked Questions
- 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.
- What are the best prediction markets for UK traders in 2026?
- For UKGC-regulated markets: Betfair Exchange (sports, politics) and Smarkets (sports, politics, lower commission than Betfair). For broader global event prediction: Polymarket (deepest liquidity, 0% fee, USDC settlement). For US-regulated option: Kalshi (USD, limited UK payment options). Most serious UK traders use a combination of Betfair for regulated sports and Polymarket for broader markets.
Trade Highest temperature in Shenzhen on August 6? on Best Prediction Markets UK
Live order book, 0% fees, USDC settlement in seconds.
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