Wachau, day trip in Austria

Last day in Vienna and booked a trip out to the Wachau region. About 80 km north, along the Danube River and known for great scenery. Went through Durstein and Krems, then got on a river boat at Spitz. North to Melk then tour of the Benedictine abbey. Massive place. Got lots of sun on my face, but awfully cold. I was lucky to borrow a sweater from a colleague yesterday, and went out to buy a scarf last night. Totally failed to plan for the weather when I packed!