Platform comparison
| Platform | YES odds | NO odds | Fee | KYC | Settlement | |
|---|---|---|---|---|---|---|
Polymarket (via Sport Prediction) Pick polygram.ink (preferred broker) |
69% | 31% | 0% (USDC on-chain) | No-KYC up to $1,500 | USDC, auto via UMA oracle | Live odds → |
Polymarket (direct) polymarket.com |
69% | 31% | 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 |
|---|---|
| 30°C | 69% |
| 29°C | 18% |
| 28°C | 8% |
| 27°C or below | 4% |
| 31°C | 4% |
| 32°C | 0% |
| 33°C | 0% |
| 34°C | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C or higher | 0% |
Market context
Madrid's summer temperatures in late July regularly exceed 35°C, with the city's airport station frequently recording highs in the 36–40°C range during this period. The market resolves based on the single highest temperature reading at Adolfo Suárez Madrid-Barajas Airport on 25 July 2026, with settlement determined by Wunderground historical data.
Historical records show Madrid experiences extreme heat variability in late July depending on whether Atlantic systems or North African high-pressure systems dominate. Between 2015 and 2023, the airport station recorded July 25 highs ranging from 28°C to 39°C, reflecting the substantial year-to-year swing. The current 4% implied probability suggests traders expect a notably cooler-than-typical outcome for this date, positioning the market towards lower temperature brackets rather than the 38–40°C range that characterises Madrid's hottest July days.
Key variables include the Atlantic Oscillation index and positioning of the Azores high in early-to-mid July 2026, which determine whether cool Atlantic air reaches the Iberian Peninsula or whether heat from North Africa dominates. Spain's meteorological agency (AEMET) typically issues seasonal forecasts by June, providing early signals about summer circulation patterns. Traders should monitor late-June weather model consensus and any unusual atmospheric patterns emerging in the weeks preceding the settlement date, as these directly influence whether conditions favour anomalously cool temperatures or revert to Madrid's typical late-July heat signature.
Methodology
Sports-specific comparison page for Highest temperature in Madrid on July 25?. 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.
- What are live sports odds on Polymarket?
- Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
- 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.
- What's the difference between match odds and outright odds?
- Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.
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