Pronóstico: Highest temperature in Madrid on July 21?

Platform comparison

Market context

Madrid's summer heat peaks in late July, with average highs around 32–34°C at the airport station. The settlement window closes at midday on 21 July 2026, meaning only temperatures recorded up to that point will count toward resolution. Historical data from Adolfo Suárez Madrid-Barajas Airport shows that July typically sees maximum temperatures ranging from 28°C to 38°C, with extreme readings occasionally exceeding 40°C during heat waves. The 0% crowd probability suggests traders are either uncertain about the specific temperature thresholds available in this market or expect conditions well below historical norms for that date.

Comparable July days at the airport station provide the baseline for calibration. In recent years, Madrid has experienced several heat waves during mid-to-late July, with peaks of 36–39°C recorded on individual days. The European summer weather pattern for 2026 remains unknown, though long-range forecasting at this distance carries substantial uncertainty. Traders should monitor seasonal climate outlooks released by national meteorological services in spring 2026, as these may signal whether the northern hemisphere is tracking toward above or below-average temperatures. The specific resolution source—Wunderground's historical data for the airport station—is publicly accessible and updates automatically, removing ambiguity around measurement location or methodology once the date passes.

Methodology

Football-specific comparison page for Pronóstico: Highest temperature in Madrid on July 21?. 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 (US-focused) or Manifold (play-money).

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

Are prediction markets better than sports betting?

Prediction markets tend toward tighter odds than bookmakers because they use peer-to-peer exchange rather than bookmaker margin. On major matches, Polymarket quotes typically sit 2-5% closer to the true probability model than bet365 or DraftKings.

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.

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.