Recent forecasts from multiple models indicate Madrid's September 26 high will likely peak near 31–33 °C under partly cloudy skies and light southerly flow, with trader consensus split between the 33 °C and 34 °C bins reflecting model spread in daytime heating. Key variables include the extent of afternoon cloud cover, which reduces surface insolation, and subtle differences in boundary-layer mixing and downslope warming from surrounding terrain. Official AEMET observations will resolve the exact maximum, and any late-day clearing could push readings toward the upper end of the range while persistent stratiform clouds would cap them lower. Historical late-September averages near 25–27 °C underscore the current warm anomaly driven by persistent high pressure.