Highest temperature in Madrid on July 22?

Platform comparison

Market context

Madrid’s late-July heat is the real-world anchor here: the settlement is tied to the highest reading at Adolfo Suárez Madrid-Barajas Airport, not the city-centre forecast, so the relevant question for traders is whether the airport station prints 39°C, 40°C, or an outlying hotter value before midday UTC. Current market pricing at 0% for YES indicates no confidence in the settlement condition yet, but the live book shows 39°C as the clear frontrunner at 77%, with 40°C priced at 21%, which is consistent with a market expecting a very hot day rather than an extreme spike.[1]

Historical-style reading matters because Madrid in summer often clusters around the high-30s, and today's public forecasts are already in that band: one Spanish-language outlook puts the maximum at 39°C with no rain, while another has 38°C and light winds.[2][3] For a programmatic workflow, that means a bot or conditional-order setup should treat 39°C as the base case, then monitor any intraday update that could lift the airport’s maximum into 40°C territory, especially if the settlement source is showing late-afternoon warming rather than the city forecast headline.[1][2][3]

The main catalysts are the daily forecast revisions, the timing of the temperature peak at the airport station, and any heatwave-related uplift in central Spain that keeps temperatures elevated into the afternoon; one July 2026 forecast update broadly described central Spain, including Madrid, at 37–41°C, which is exactly the range that can move a narrow temperature market by one bucket.[4] For traders using tooling, the practical trigger is not headlines alone but the observed maximum reported by Wunderground for LEMD before the settlement window closes, so monitoring the source page and any forecast refreshes is more useful than reacting to generic Madrid weather summaries.[1][4]

Sources: 1 · 2 · 3 · 4

Methodology

We track Highest temperature in Madrid on July 22? 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

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.

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.

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.