Highest temperature in Madrid on August 7?

Platform comparison

Market context

Madrid’s highest temperature is shaping up as a **favourite-to-run-hot** weather market, but the crowd’s **0% YES** implies either stale pricing or a mismatch between the market’s range bands and the likely afternoon peak. Contemporary forecasts for Madrid on 7 August 2026 cluster around the **mid-to-high 30s Celsius**, with one report putting the maximum at **37°C** and another at **37.9°C**, while broader Spain coverage points to widespread interior heat above **35°C** and locally near **40°C** in the hottest pockets.[3][6][9] On that basis, the consensus sits around the **37–38°C band**, with the main value likely in **contrarian higher-temperature ranges** if Madrid’s airport station runs a bit hotter than city-centre forecasts.[2][3]

Historical context also leans warm rather than benign. August is Madrid’s hottest month on average, with long-run norms around the high 20s to low 30s in Celsius depending on the source, and Madrid regularly sees August days well above those averages.[10][12] Recent heatwave reporting from Reuters underlines that Spain entered summer 2026 with already elevated temperature risk, which supports the idea that a single-day spike into the upper 30s is not an outlier in this setup.[16] In handicapper terms, the **underdog is the cooler band** and the **favourite is a hot finish above 35°C**, while the market may still be underestimating just how often Madrid airport can squeeze out an extra degree relative to headline city forecasts.[3][9]

The key catalysts are the final local forecast updates and any heat advisory language from Spain’s meteorological services, because small shifts in cloud cover, wind, or Saharan dust can move an airport reading by a degree or two. Current reports already suggest **clear skies**, **little rainfall risk**, and only moderate wind, which usually favours stronger daytime heating rather than suppression.[3][9] Traders should also keep an eye on the day’s hourly evolution rather than the summary high, because this market resolves off Weather Underground’s **Daily Observations** table for Madrid-Barajas Airport, not the day-high summary, so the final printed hourly maximum is what matters.[19]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Highest temperature in Madrid on August 7? across the five venues with material prediction-market liquidity. The probability shown is the live Polymarket mid; the comparison rows summarise how each venue treats the underlying contract — fees, KYC thresholds, settlement currency, deposit options. The highlighted row marks the cheapest route into Polymarket's order book.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

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's the difference between YES and NO shares?

A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.

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 Who Will Win 2026 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.