Haute-Corse : When should you leave?
Corsica has a Mediterranean climate, with a southern latitude, pleasant all year round, with 300 days of sunshine per year and an average of 15.5°C in winter and 28°C in summer. In autumn, especially on the coast, temperatures average 26 °C in September, 20 °C to 22 °C in October and 17 °C in November. Spring is also pleasant with 17 °C in April and 24 °C to 26 °C in June. The mountainous part of Haute-Corse, subject to the alpine climate, is covered with snow in winter.
When to go to Haute-Corse ? If the crowd of tourists is too much for you, avoid the very touristy season, from the beginning of July to the end of August. Especially since the climate in Corsica is pleasant from April to November, and the great weather is guaranteed from May-June to mid-September, so don't miss the shoulder seasons. However, you should know that it is generally warmer at Cap Corse than in Bonifacio. The air is always cooler in the mountains, at least from 500 m altitude, than on the coast. Bring a little wool inland. Beware of brief but violent storms, which often occur in the interior during the summer, causing floods that can be devastating and rivers that are very violent. Nevertheless, rains are rare with barely fifty days of rain per year. Sometimes the wind blows very hard. Don't forget that in spring, the maquis is in bloom. An enchantment. In autumn, there are blazing colors in the forest and chestnuts and mushrooms to pick. Valuable hint: the temperature of the sea (on the coasts) is on average 15°C in winter and 25°C in summer.