Latest Météo-France forecasts and ensemble guidance point to a peak near 38°C in Paris on August 13 under a strong high-pressure ridge promoting clear skies, subsidence, and light winds across western Europe. This setup favors daytime heating above the long-term August mean of roughly 25°C, with urban heat-island effects in the city center likely adding 1–2°C. Recent model runs show tight consensus around 37–38°C, though minor spread in timing and cloud cover leaves room for 37°C or a brief push to 39°C. Traders assign the highest implied probability (45.5%) to 38°C, reflecting skin-in-the-game assessment of forecast uncertainty ahead of official station observations used for resolution. Updated model runs tonight and tomorrow morning represent the next key data points.