**Stable high-pressure conditions and clear skies over central Spain have locked in a minimum temperature near 14°C for Madrid on October 15, 2026, driving the 95% market-implied probability.** Official forecasts from GFS and Open-Meteo models show overnight radiative cooling under mostly clear to partly cloudy skies, with light easterly winds and dew points supporting a low around 14–15°C (57–59°F) before daytime warming to 26°C. This aligns with typical mid-October climatology for the region, where average daily minima hover near 12–14°C absent strong Atlantic or continental influences. Recent model runs show minimal spread, reinforcing trader consensus on this narrow range. A realistic challenge would require an unforecasted increase in cloud cover or a sharper nocturnal inversion that raises the minimum above 15°C, though current observations and steering patterns make such shifts improbable before resolution.