However, cold periods may occur, with temperatures below freezing, when France is affected by cold air masses from Russia.

Given the exposed position on the ocean, Brittany is less prone to cold waves than the rest of France (excluding the Mediterranean coast). On the other hand, the summer is particularly cool. The average January temperature exceeds 8 ☌ (46.5 ☏), and generally, the temperature does not drop below freezing even on the coldest days of the year. The small islands west of Brittany (see Ushant) are particularly mild. When the southern currents prevail, the temperature can reach 12/14 ☌ (54/57 ☏) even in winter, although the wind can be strong. Winter, from December to February, is quite mild: the temperatures are usually above freezing (0 ☌ or 32 ☏) even at night, though wind and humidity increase the feeling of cold. Here is the average precipitation in Saint-Malo. On the highest peak in Brittany, Monts d'Arrée, an ancient mountain massif that today is only a hill 387 meters (1,270 feet) high, precipitation reaches 1,500 mm (60 in) per year, and in winter it snows more often than in the plains. The least rainy season is summer, when it rains for about 10/12 days per month. Precipitation is abundant on the west coast (see Brest), where it exceeds 1,100 millimeters (43 inches) per year, while it drops to 950 mm on the south coast (see Lorient), below 800 mm (31.5 in) along the north coast (see Saint-Malo), and to about 700 mm (27.5 in) in the eastern inland area (see Rennes), although the rains are frequent throughout the year everywhere. Saint Malo - Average temperatures (1991-2020) Month

High Wind in Brittany by Caroline Gayet