**Trader sentiment for Madrid’s June 13 high centers on 34–35 °C (combined ~77.5 % implied probability), reflecting ensemble guidance from ECMWF and AEMET pointing to a warm but not extreme late-spring day on the Meseta Central.** June’s near-peak solar insolation, combined with the city’s inland plateau location and urban heat-island effect, favors strong daytime heating under predominantly anticyclonic flow. Subtle differences among the leading outcomes hinge on boundary-layer details: minor variations in low-level moisture, wind speed (which modulates turbulent mixing), and the precise timing of any weak trough or ridge passage can shift the maximum by 1–2 °C. Clear skies and light winds would support the upper end of the range, while increased cloud cover or stronger advection of cooler Atlantic air would cap temperatures nearer 33–34 °C. Current model consensus and the absence of an intense Saharan plume keep probabilities for 36 °C or higher low, while climatological June averages near 29–32 °C anchor the market away from cooler outcomes. Updated AEMET and ECMWF runs over the next 48 hours remain the key near-term catalysts.