**Current atmospheric conditions and AEMET guidance are driving the near-certain trader consensus around a 24°C high for Madrid on October 4.** Forecast models show a covered sky with showers and isolated thunderstorms developing through the afternoon, limiting strong daytime heating yet still allowing temperatures to peak near 24°C—roughly 1–2°C above the 1991–2020 daily average high of 22.2°C. Official station data from central Madrid (e.g., Retiro) and real-time observations align with this range, with no significant model divergence or unexpected cooling from cloud cover or precipitation expected to shift the outcome. The market-implied probability reflects aggregated trader assessment of these verified inputs ahead of final resolution based on the day’s maximum official reading. A late surge in clearing skies or a sharper-than-forecast rain event could still alter the exact peak by 1–2°C.