Highest temperature in Madrid on July 24?

Platform comparison

Market context

Madrid’s 24 July high will be judged on the single warmest reading at Adolfo Suárez Madrid-Barajas Airport before the market’s noon UTC settlement cut-off, so the key variable is whether the airport gets one of its normal midsummer peaks or a cooler, earlier-than-usual maximum. For a programmatic approach, the useful input is the daily weather history feed at Wunderground for LEMD, with the settlement value tied to the day’s recorded maximum rather than a forecast snapshot.

The current 0% implied probability for **YES** is best read against Madrid’s July climatology rather than any specific forecast. Typical July highs are around 34°C, while recent reporting for comparable late-July days has shown forecasts clustered nearer 30°C when conditions are slightly less intense than average.[4][1][3] BBC Weather also places Madrid around 30°C in a current forecast, with modest humidity and light wind, which is consistent with a warm but not exceptional setup.[2]

For traders using tooling, the main catalysts are the evolution of short-range forecasts, the exact timing of the airport’s maximum temperature, and any midday cloud, wind shift, or convective development that can cap the high before 12:00 UTC. A bot or conditional order model would typically monitor hourly forecast updates and compare them with the historical July range for Madrid, because a few degrees either side of 30°C can determine which settlement band the final reading falls into.[1][2][3][4]

Sources: 1 · 2 · 3 · 4

Methodology

We track Highest temperature in Madrid on July 24? 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

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

How does resolution work?

Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.

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 Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.