If you're looking for summer vibes, the best time to travel to Annecy is in July, June and August, when the average temperature reaches 21.32 °C, while July, August and June are the 3 sunniest months of the year, with an average of 150.0 hours.
However, if you prefer colder temperatures, make sure you visit Annecy during January, February or December to experience an average of -0.34 °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, June and July, when the average precipitation in Annecy is 6.75 mm, while the months of January, February and March are drier, with an average of 0 mm.