Current trader consensus on a 29°C high for Madrid on September 30 reflects the latest observational data and short-range model runs from Spain’s Agencia Estatal de Meteorología (AEMET) and European ensembles, which converge on a peak afternoon temperature matching that threshold under stable high-pressure conditions and limited cloud cover. Recent September warmth across the Iberian Peninsula, with daily maxima consistently in the upper 20s, supports this positioning amid seasonal cooling trends that typically bring Madrid highs near 25°C by month-end. Uncertainties remain in microscale factors such as urban heat island effects or minor frontal passages that could alter the exact maximum by 1–2°C, though resolution criteria hinge on official station readings rather than forecasts.