**Current numerical weather prediction models from sources like Open-Meteo and European centers indicate a maximum temperature near 33–34°C for Madrid on September 25, 2026, under stable high-pressure conditions with light southerly or variable winds, clear to partly cloudy skies, and negligible precipitation risk.** This aligns with a late-September pattern where Madrid’s continental climate often sees daytime highs several degrees above the 1991–2020 average of 24.4°C when subsidence and warm advection persist. Recent September 2026 observations show a warm anomaly, with multiple days reaching 34–36°C earlier in the month before a brief cooldown. Ensemble guidance shows limited spread around the 33–35°C range, supporting the market’s heavy weighting toward 34–36°C outcomes. The next 24–48 hours will feature updated runs from the European Centre for Medium-Range Weather Forecasts and Spain’s AEMET, which could refine the exact peak if boundary-layer mixing or wind shifts alter the outcome. Historical precedent notes a 35°C record for the date, though such extremes remain uncommon this late in the season.