Highest temperature in Madrid on July 12?

Platform comparison

Market context

Madrid faces a scorching mid-July 2026, with the 12th sitting inside a confirmed heatwave that has already pushed central Spain to record-breaking highs. The crowd-implied probability of 0% YES for any specific temperature range suggests the market expects a definitive, singular outcome rather than a tie or ambiguity, yet this zero figure may mask a contrarian view on volatility. Historical precedent from the early July 2026 event shows temperatures climbing to 42°C (107°F) on 5–6 July, nearly 9°C above the seasonal average, indicating that the consensus is heavily skewed toward extreme heat rather than mild conditions [2].

The consensus currently treats the Adolfo Suárez Madrid-Barajas Airport Station as a guaranteed high-temperature venue, but value may sit in the specific range brackets if the heatwave persists or intensifies. Traders should monitor the Met Office forecast for 12 July, which currently predicts a maximum daytime temperature of 36°C, a figure that appears significantly lower than the 42°C peaks recorded just days prior [3]. This divergence between the recent 42°C record and the current 36°C forecast creates a potential value spot for contrarians betting on a continuation of the extreme heat rather than a rapid cooldown, especially given the dry, clear-sky conditions that have dominated the region [2].

The primary catalyst is the official Wunderground daily record for LEMD, which will settle the market based on the highest temperature recorded at any time on 12 July. With the settlement window ending at 12:00 UTC on 12 July 2026, the market resolves within hours of the event, leaving little time for late adjustments [2]. Recent reporting from Reuters confirms that Spain entered its first official heatwave of 2026 on 21 June, with temperatures reaching 40°C, establishing a baseline of extreme thermal stress that makes a sudden drop to mild temperatures unlikely without a significant weather shift [6].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Who Will Win 2026, which mirrors the Polymarket order book directly.

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

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 Who Will Win 2026. 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 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.

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.