Nuremberg, the second largest city in Bavaria, was the center of the German Renaissance. The city has been the center of politics since the early middle ages. While the city was almost completely bombed in WWII, the main structures were rebuilt using the original stone. There is a lot for the tourist to see in Nuremberg, including the castle--the "Kaiserburg"--with great views of the central city and its half-timbered houses.
Nuremberg is noted for the important "Nuremberg trials".
Weather wise, the best months to travel to Nuremberg are May through September. There's a pretty sharp drop in temperatures in October, as you can see in the charts below. Nuremberg has around 70 days of rain a year, and they're pretty well distributed throught the year.
The charts below show the historic high and low temperatures in Nuremberg and the month by month historic rainfall totals.