A persistent high-pressure system and early heatwave across northern France drove elevated nocturnal minimum temperatures in Paris on May 26, 2026, keeping the overnight low near 17°C according to Météo-France analyses and supporting model runs. Warm advection from the south, combined with clear skies and light winds, limited radiative cooling and prevented the temperature from dropping to typical late-spring levels around 11–13°C. This consensus aligns with observed highs near 32°C and official guidance showing lows holding at or above 16–17°C. Only an unexpected localized cooling pocket or measurement anomaly at the reference station could shift the recorded minimum lower, though current data indicate such outcomes remain highly improbable.