Overview
- A cold upper‑level low overnight on December 24–25 brought snow down to the plains from the German border to the Atlantic coast.
- The Rhône Valley and Lyon area saw the most substantial snowfall, while many regions reported only a light coating.
- Brittany recorded a rare Christmas dusting in cities such as Saint‑Brieuc and Rennes, where road gritters were deployed.
- Météo‑France warned of localized freezing rain this morning in Tarn and Aveyron, posing travel hazards.
- Prefects launched the "plan grand froid" in several departments as sub‑zero temperatures set in for days, with outreach in Rennes doubled for the homeless.