January in Brest averages a daily high of -0.2°C with nights around -4.9°C. Expect roughly 12.1 wet days totalling 31.5mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Brest is May–September.
Based on BREST, BO (2.5km), 1995–2024. 11 years of January data.