If you're looking for summer vibes, the best time to travel to Graz is in July, June and August, when the average temperature reaches 21.92 °C, while August, June and July are the 3 sunniest months of the year, with an average of 82.43 hours.
However, if you prefer colder temperatures, make sure you visit Graz during January, December or February to experience an average of -1.78 °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, February and March, when the average precipitation in Graz is 8.08 mm, while the months of January, February and March are drier, with an average of 0 mm.