Overview

• On September 27, southwest cities such as Carcassonne, Toulouse and Tarbes recorded lows near 5–7°C and afternoon highs of 21–24°C, according to Météo Ciel data cited locally.
• Météo-France links the cool mornings to radiative cooling under clear skies within an autumn pattern, while areas with cloud cover saw milder minimums above about 12°C.
• From Monday, forecasters expect calmer, sunnier conditions under the Azores anticyclone, with around 15–17°C at daybreak and 20–22°C in the afternoon in Nouvelle-Aquitaine.
• Nationally, mornings remain fresh with local fog and a risk of the first lowland frost in the coolest eastern interiors midweek, as daytime highs return closer to seasonal norms.
• Late week may bring a slight dip in temperatures and a thin high cloud veil, with a possible Atlantic disturbance near the Channel on Friday, and seasonal guidance cautiously tilts toward a milder, relatively drier autumn.