Recent high-pressure dominance across western Europe, with warm southerly flow and mostly clear skies, supports overnight minima in Paris clustering around 19–21°C for August 3. Ensemble guidance from ECMWF and Météo-France shows modest radiative cooling potential under light winds, tempered by the urban heat island and residual warmth from daytime highs near 34–38°C. The tight spread in market-implied odds reflects remaining model divergence on boundary-layer mixing and exact cloud timing, with 19°C edging ahead due to recent runs favoring slightly cooler dawn readings than the seasonal 15–18°C baseline. Updated short-range forecasts over the next 48 hours will likely narrow resolution probabilities further.