Highest temperature in Madrid on July 25?

Platform comparison

Market context

Madrid's summer heat peaks in late July, with the city regularly experiencing daily maxima above 35°C during this period. The settlement mechanism relies on a single data point: the highest temperature recorded at Adolfo Suárez Madrid-Barajas Airport Station on 25 July 2026, sourced from Weather Underground's historical records and toggled to Celsius via the platform's settings interface. This airport station serves as Madrid's official reference point for meteorological measurement, making it the authoritative source for resolution.

Historical precedent suggests the 4% implied probability reflects realistic constraints on extreme heat. Madrid's July temperature records show that readings above 42°C occur roughly once per decade at the airport station; the city's all-time high of 40.5°C was recorded in August 2021. July 2022 saw a peak of 40.1°C during an Iberian heatwave, whilst more typical July maxima range between 35–38°C. For a trader building conditional orders or automated monitoring systems, the market's current odds price in a roughly 1-in-25 chance of exceptional heat, consistent with historical frequency of extreme outliers.

Catalysts to monitor include seasonal weather pattern forecasts from AEMET (Spain's national meteorological agency) and broader European atmospheric pressure systems developing in early July 2026. Heatwave formation typically correlates with persistent high-pressure systems over the Iberian Peninsula, which can be tracked through medium-range ensemble forecasts. A trader's programmatic approach would benefit from integrating AEMET's 10-day forecasts alongside broader European weather models, since sustained heat anomalies usually signal 7–10 days in advance. The settlement window closes at midday UTC, requiring real-time data verification against Weather Underground's historical archive.

Methodology

This page reviews Highest temperature in Madrid on July 25? across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Polymarket Bot UK, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.