Beautiful and accessible year round, it is hard to pinpoint when not to visit Provence. Peak season of course brings many tourists and high heat, so should you be looking for quieter streets and more secluded trails, try late Spring and early Autumn.
Winter is also not to be overlooked, a Christmas in Provence can play host to a magical setting along with its Christmas markets in the larger towns such as Aix-en-Provence.
Should the famous sights of purple lavender fields be something to treasure, come July to not miss Provence in all its glory.