Recent forecasts from numerical models such as GFS indicate clear skies and light winds over Madrid on September 11, supporting a daytime high near 30–31 °C, which aligns with the market’s leading implied probabilities of 55.5 % for 31 °C and 34.5 % for 30 °C. This outcome sits above the 1991–2020 climatological average high of 27.5 °C for the date, consistent with the warmer-than-normal pattern observed across early September 2026 when readings reached the mid-30s. Stable high pressure and minimal cloud cover are the primary drivers keeping probabilities concentrated in this narrow range, while the small shares assigned to 29 °C or 32 °C+ reflect residual uncertainty in model guidance and potential micro-climate variations at official stations. Updated model runs and observational data releases in the next 48 hours will provide the next key inputs for traders assessing any late adjustments to peak temperature.