Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Polymarket Review UK) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Trade this market → |
Polymarket (direct) polymarket.com |
100% | 0% | 0% | Geo-blocked in US/UK/EU | USDC, on-chain | Trade this market → |
Kalshi kalshi.com |
— | — | Up to 7% per trade | US-only, KYC required | USD | Trade this market → |
Betfair Exchange betfair.com |
— | — | 2-5% commission | Full KYC from first trade | GBP / EUR | Trade this market → |
Manifold Markets manifold.markets |
— | — | Play-money (mana) | None — play-money | Mana (no cash-out) | Trade this market → |
Outcome probabilities
Current market-implied probability for each outcome, from the live order book.
| Outcome | Probability |
|---|---|
| 31°C | 100% |
| 25°C or below | 0% |
| 26°C | 0% |
| 27°C | 0% |
| 28°C | 0% |
| 29°C | 0% |
| 30°C | 0% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C or higher | 0% |
Market context
Guangzhou’s airport temperature on 1 August is a straight intraday weather outcome: the market resolves on the **highest reading** logged at Guangzhou Baiyun International Airport Station in Celsius, and the practical question for traders is whether the day prints into the low 30s or gets lifted by a hotter afternoon spike. August normals in Guangzhou are already elevated, with average highs around 33°C and a humid, rainy profile that often keeps maxima close to the low-to-mid 30s rather than extremes[1][11][18].
That makes the current **0% YES** crowd price a notable outlier against climate history. Long-run August data place Guangzhou’s typical high around 32–33°C, while some August days in recent seasonal summaries have reached the mid-30s and occasionally above 36°C[2][5][20]. For a power-user running a script or conditional order set, the key edge is that a binary “above/below band” view is usually more robust than treating this as a single-point temperature call: the settlement source is a station reading, not a city-wide average, so local convection and airport-specific conditions matter more than general Guangzhou forecasts[12].
The main catalysts are the same ones a programmatic watcher would ingest: the day’s rolling forecast updates, afternoon convective rain or cloud cover, and any synoptic change that suppresses heating before the late-day maximum. Short-range forecast products currently show August highs for Guangzhou clustering around 89–93°F, which is roughly 32–34°C, so a run-up into the settlement window would usually need a warmer-than-average afternoon and limited rain-cooled downdraft[9][10]. Because the market settles on the Wunderground station record for the whole day, the useful workflow is to poll the station history page for the latest max, compare it with forecast highs and precipitation timing, and adjust only when the airport’s observed trend starts to diverge from the broader city forecast[12].
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 Polymarket Review UK, which mirrors the Polymarket order book directly.
Resolution & payout
At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.
On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.
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 Polymarket Review UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.
Trade Highest temperature in Guangzhou on August 1? on Polymarket Review UK
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