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 |
|---|---|
| 39°C | 100% |
| 34°C or below | 0% |
| 35°C | 0% |
| 36°C | 0% |
| 37°C | 0% |
| 38°C | 0% |
| 40°C | 0% |
| 41°C | 0% |
| 42°C | 0% |
| 43°C | 0% |
| 44°C or higher | 0% |
Market context
Madrid is in the middle of a severe summer heat spell, and the market is being resolved off the highest temperature recorded at Adolfo Suárez Madrid-Barajas Airport on the day, not a citywide average. A Spanish weather preview published this morning put Madrid’s maximum at **39°C** with **0% rain** and largely clear conditions, which fits the market’s current lean towards a high-30s outcome rather than a run at the low 40s.[2][3]
The current pricing reflects that pattern: **39°C** is the clear frontrunner at **77%**, with **40°C** next at **21%**.[1] That shape is consistent with recent Madrid heat episodes, when temperatures have repeatedly pushed into the low 40s during strong heatwaves, but usually need the most intense part of the day to line up with very hot, dry air and little cloud cover.[4][5] For a July settlement in Madrid, the key question is often whether the airport station briefly touches the next degree band or tops out just below it.
The main catalysts traders should watch are the official forecast updates and any last-minute change in the heatwave pattern, especially cloud cover, wind, or overnight cooling that could affect the daytime peak. The current report highlights dry, mostly clear conditions, which supports a high maximum, but a small shift in the intensity or timing of peak heating can be enough to decide whether the reading lands on **39°C** or **40°C**.[2][3]
Methodology
Sports-specific comparison page for Highest temperature in Madrid on July 22?. 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.
- 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.
- 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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