**Latest official forecasts from sources including AEMET, eltiempo.es, and the Met Office point to a maximum of 29–31°C in Madrid on August 20, 2026, under partly cloudy to clear skies with moderating Atlantic influences.** This aligns with the market’s strongest clustering at 31°C (40.5%) and 32°C (29.5%), reflecting trader consensus on a cooling shift from earlier August heat. Madrid’s late-summer climatology features declining daily highs (typically 31–33°C in mid-to-late August) as solar insolation decreases and occasional troughs or northerly flows replace the dominant subtropical ridge. Recent AEMET guidance shows temperatures easing from 35–38°C earlier in the week to around 30°C by the 20th, consistent with ensemble model runs indicating limited warm advection and possible increased cloud cover or light winds that suppress peak heating. Key variables traders are monitoring include any last-minute model shifts in steering patterns or boundary-layer moisture, which could push the daily maximum across the 31–32°C threshold. With resolution imminent, the market-implied distribution emphasizes the narrow uncertainty band typical of short-range temperature forecasts in this region.