Graz is the second largest and one of the most important tourist destinations of Austria. The weather here can be classified to be warm summer continental kinds with influences from the Mediterranean and gets shielded from extreme winds by the Alps. The average annual temperature is around 8 – 9 degree Celsius and rainfall is majorly experienced in the summer months.
The best time to visit Graz is during the spring season months of March to May. The weather is slightly cool, but not too much and pretty comfortable for sightseeing. The rainy season summer months should be generally avoided but if you are looking for lower tariffs then are good for planning a visit.