German buildings are not air conditioned. A sweater is nice to have for chilly mornings or late evenings. The humidity can make a cool evening feel rather cold. Bring a swimsuit and a towel. There will likely be several opportunities to go sun bathing and swimming at one of the many lakes near the town.
Walking shorts are nice to have, especially when the weather gets hot and muggy.
Unless you plan on going to a fancy concert or theater production, dress-up clothing is not at all essential. However, it is good to have at least one set of decent looking clothes for that evening at a good restaurant or in an upscale disco. German women like wearing skirts and German men often wear light jackets. Keep in mind that your main means of transportation is a bicycle, so dress appropriately for the bike. Please pick up your application materials from the Office of International Education.