Highest temperature in Madrid on July 31?

Platform comparison

Market context

Madrid is currently set up for a hot late-July finish, with local forecasts clustering around the mid-to-high 30s Celsius and some services flagging a peak near 38°C. That sits comfortably above the city’s July norm, where average daily maxima are roughly 31–33°C and values above 37°C are described as uncommon but possible. [4][6]

For a market settled on the highest reading at Madrid-Barajas Airport, the key historical lens is that extreme heat in Madrid is not rare in midsummer, but it usually needs a sustained Spanish heat surge rather than a routine warm day to push airport readings into the upper 30s. Recent Madrid July history also shows that highs can run close to 40°C in very hot spells, which means a 0% crowd price is hard to square with the seasonal baseline if forecasts keep leaning hot. [10][18]

The main catalyst is the evolution of the forecast itself: traders should watch whether the current high-temperature guidance holds through the final hours before the settlement cut-off, and whether any short-term cooling from cloud cover, wind or a shift in air mass lowers the day’s maximum at Barajas. Wunderground’s daily history page is the resolution source, so the market will track the single highest station temperature reported for the day rather than a citywide average. [14]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for Highest temperature in Madrid on July 31?. 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

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.

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?

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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.