Highest temperature in Madrid on August 7?

Platform comparison

Market context

Madrid is already in a firmly hot regime, with AEMET warning of a yellow alert for maximum temperatures of 37°C across the metropolitan area and Henares, while local reporting this morning also pointed to a day of intense heat and little cloud cover. The key detail for this market is that the settlement source is the Weather Underground daily observations for Madrid-Barajas airport, so the relevant number is the highest observed reading at the station, not the headline “day high” summary.

For context, August in Madrid is normally hot enough to produce upper-30s readings, but the airport station can occasionally run a little differently from central-city forecasts because of site conditions and timing. Recent comparable cases suggest that when AEMET issues a 37°C warning and forecasts stay dry and sunny, the airport’s peak often lands in the mid-to-upper 30s rather than far below it. That makes the current 0% yes-implied price look anchored to an unlikely low-temperature outcome, not to a materially cooler forecast regime.

The main catalyst to watch is the late-afternoon evolution of the airport observation record on Weather Underground, because the market resolves on the highest value captured there before the settlement window closes. On a day like this, traders are effectively leaning on official heat warnings and the live station trace rather than on broader city forecasts; Reuters noted in June that Madrid had already faced 40°C conditions during Spain’s first official heatwave of 2026, underscoring how quickly readings can move when Iberian heat builds.[17]

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Highest temperature in Madrid on August 7? across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. For users geo-blocked from Polymarket directly, brokers like Trump Prediction provide a 0%-fee route into the same order book.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

UK Frequently Asked Questions

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Historically more accurate than polls. Polymarket's Brier score on US 2024 elections was ~0.11 — better than 538 (~0.14) and every mainstream poll. Markets aggregate information with real skin in the game.

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Polymarket defines the source per contract — usually Associated Press (AP Race Call), Reuters or the official electoral commission. The source is stated in contract details before the market opens.

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Polymarket — by far. US 2024 presidential volume was ~$3.5B vs Kalshi (~$200M) and Betfair (~$120M). Where Polymarket is geo-blocked, brokers like Trump Prediction route into the same order book at 0% fees.

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Yes. Betfair Exchange and Smarkets offer UKGC-regulated UK election markets (seat counts, party share, constituency results). Polymarket also lists UK election contracts with deeper global liquidity. Betfair winnings are typically tax-free for UK individuals; Polymarket profits are subject to HMRC CGT.