Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
100% | 0% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
100% | 0% | 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 |
|---|---|
| 34°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% |
| 33°C | 0% |
| 35°C | 0% |
| 36°C or higher | 0% |
Market context
Chengdu’s reading on 4 August is set by the **highest temperature** recorded at Chengdu Shuangliu International Airport, so the key question is whether daytime heating can push the station into the mid-30s Celsius before cloud and showers cut the top off. Seasonal guides put Chengdu in a hot, humid monsoon pattern in early August, with typical daytime highs around **30–32°C** and frequent rain or scattered convection, which usually keeps the upper end of the distribution close to the low-to-mid 30s rather than much higher.[2][7][13]
That framing makes the current **0% YES** crowd view look detached from the climate norm, not from a special cold spell. Comparable August forecasts for Chengdu repeatedly cluster around **32°C to 35°C**, with several services showing 4 August near **32°C/24°C** or even **34°C** in the broader area, and one station-based guide listing 4 August historical averages around **32.1°C** for the day’s high.[1][3][9][11] In other words, a resolution at or above 30°C would be consistent with the usual August pattern, while an outcome below that would require an unusually suppressed daytime peak.[2][5][18]
For traders, the important catalysts are the afternoon cloud and rain profile, because Chengdu’s heat can be capped quickly if thunderstorms develop early, but can also spike if sunshine holds through mid-afternoon.[1][3][17] Wunderground’s final settlement will use the station’s highest recorded temperature for the full day, so late-day revisions matter only until the next day’s first datapoint is published; that means any update to the airport station feed, a sharp forecast shift, or a change in convective timing could still move the market before settlement.[14]
Methodology
Sports-specific comparison page for Highest temperature in Chengdu on August 4?. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.
Resolution & payout
Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.
FAQ
- When do sports markets resolve?
- Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
- Can I bet on individual matches?
- Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
- Which sports markets are available?
- Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
- How fast do sports winnings settle?
- Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.
- Can I import form data and lineups?
- This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.
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