**Trader sentiment centers on the 37°C outcome at 58% implied probability because official AEMET guidance and ensemble forecasts project a daytime maximum near that level for Madrid on August 9.** Persistent high pressure, clear skies, and light variable winds are expected to allow strong daytime heating under late-summer insolation, with overnight lows around 22–24 °C providing limited overnight relief. Recent model runs show consensus for a peak between 36–38 °C, consistent with observed maxima of 35–38 °C in the preceding days and the region’s typical August climatology. Minor spread among global and regional models accounts for the secondary probabilities on 36 °C and 38 °C, while the near-zero odds on extremes reflect the low likelihood of significant cloud cover, advection changes, or measurement variability at the official station. The market will resolve on AEMET’s verified maximum once observations are finalized.