Current forecasts from Météo-France and regional models indicate a maximum of 28–29°C in Paris on June 15 under high pressure, clear skies, and light westerly flow that favors daytime radiative heating without strong advection of hotter air. These conditions place the outcome near the upper end of early-June normals (roughly 22–24°C) but below peak summer values, explaining why traders assign over 86% combined probability to 28°C or 29°C. Recent model runs show minimal day-to-day shifts, with only slight uncertainty from boundary-layer mixing or localized cloud development that could trim or add 1°C. The implied probabilities therefore track the narrow envelope of ensemble guidance rather than any rapidly evolving synoptic feature.