Overview
- Observations on December 29 show generalized freezes with lows near −10°C in parts of the northeast, including −10.9°C at Mourmelon‑le‑Grand.
- New Year’s Eve is forecast to be one of the coldest since 2016 with a risk of freezing fog, especially across the north and center.
- From January 1, light precipitation returns to the northern half of the country with chances of snow in the northeast and locally at low altitude, though timing and amounts remain uncertain.
- Mistral and Tramontane winds near the Mediterranean are expected to gust around 60 km/h, intensifying the cold as milder air lingers on some southern coasts.
- Météo‑France and model guidance indicate the cold pattern could hold through mid to late January, with a potential weekend snow episode in the plains still dependent on the exact track of a developing system.