Vannes has temperate weather akin to that of other European countries.
Summer (June – August): Temperatures in summer can reach up to 20°C. The climate is generally warm and comfortable.
Winter (December – February): The winters in Vannes are the coldest times of the year with temperatures dropping to 6°C.
Spring (March – May): Vannes remains the most pleasant during the spring when the average temperatures are likely to be around 17°C.
Autumn (September – November): Although cooler than summer, a few days might be warm. However, autumn in Vannes is beautiful with temperatures ranging around 9°C - 13°C.
The best time to visit Vannes is during the months March through May and September through November during the spring and autumn seasons, when the city looks at its best with greenery or when it changes colours and sheds its leaves.