Highest temperature in Madrid on August 16?

Platform comparison

Market context

On 16 August 2026, the highest temperature recorded at Madrid-Barajas Airport will determine which range this market resolves to, with settlement occurring via USDC on the btc-prediction.bet platform. The resolution hinges on the Daily Observations table from Weather Underground, not the summary high-low figures, meaning intraday peak readings take precedence. Madrid's August climate typically peaks between 32–38°C, though extreme heat waves have pushed readings above 40°C in recent years.

Historical August temperature data from Madrid-Barajas shows a median daily high near 34°C, with the station recording temperatures above 38°C roughly once every three to four years during the month. The 0% crowd probability suggests traders are pricing in either a narrow range expectation or significant uncertainty about which bracket will capture the day's peak. Comparable August dates in 2023 and 2024 saw highs in the 35–37°C band, though the Spanish meteorological service (AEMET) recorded 40°C+ events in August 2022 and 2023 during broader European heat waves.

Traders should monitor AEMET forecasts and European weather model consensus (ECMWF, GFS) from mid-August 2026 onwards, as these typically converge 7–10 days before the event. Atmospheric pressure patterns, North African heat advection, and any Atlantic low-pressure systems will be material catalysts. The settlement window closes at 12:00 UTC on the day itself, so morning observations from the airport station become critical; any discrepancy between real-time readings and the final Daily Observations entry could affect resolution timing and certainty.

Methodology

This page reads Highest temperature in Madrid on August 16? on-chain. Polymarket's quote comes directly from the Polygon order book — the only comparable venue with on-chain settlement. Kalshi (USD, off-chain), Betfair (GBP/EUR, off-chain) and Manifold (play-money) are listed alongside for venue context. Every CTA routes to BTC Prediction, which mirrors the Polymarket order book directly.

Resolution & payout

Settlement is on-chain via UMA Optimistic Oracle. A proposer posts the outcome with a bond, a two-hour dispute window opens, then the smart contract lifts winning conditional tokens to 1 USDC and sends payments to holders' wallets automatically. No withdrawal fees beyond Polygon gas.

Off-chain venues (Kalshi, Betfair, Smarkets) settle in local fiat through bank-side clearing — faster than SWIFT, slower than on-chain. Manifold pays no real cash.

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