Saint-Brieuc, France experiences a mild oceanic climate with temperatures varying throughout the year. Winters are cool, with January and February averaging around 6-8°C, while summers are mild, with July and August averaging 18-17°C. Spring brings gradual warming from March to May, with temperatures rising to averages of 9-12°C, while autumn is similar in temperature range to spring, but cools down by October and November. The summer months see more consistent warmth, with July being the warmest month on average. Overall, Saint-Brieuc's temperature remains relatively stable throughout the year, with minimal extreme fluctuations.