Salzburg is at the Northern edge of the Alps and has a typical Central European climate with hot summers and cold winters. The city has moderate weather conditions which would not hinder you from planning your trip. Though, it must be kept in mind to carry appropriate clothing. While planning your trip to Salzburg, one must keep in mind to avoid the peak season and local festivals, as the streets are full of tourists and the prices are hiked.
The best time to visit Salzburg is from September to October when summer crowds left and one can enjoy the beautiful city in comfortable temperatures. Spring time sees fewer crowds but the weather is still cold to enjoy the outdoors, making autumn the best time to visit Salzburg.