If you're looking for summer vibes, the best time to travel to Saint Brieuc is in July, August and June, when the average temperature reaches 20.64 °C, while July, June and May are the 3 sunniest months of the year, with an average of 96.2 hours.
However, if you prefer colder temperatures, make sure you visit Saint Brieuc during January, February or December to experience an average of 3.18 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during January, February and March, when the average precipitation in Saint Brieuc is 3 mm, while the months of January, February and March are drier, with an average of 0 mm.