Vienna has a moderate climate, as you can see from the temperature chart below. Expect some heat in July and August. January is downright cold.
That said, Vienna is a year round destination. There is plenty of public transportation to get you where you need to go at any time of the year.
July and August are the most popular months to visit Vienna, but folks are discovering the idea temperatures of June and Septembers. Summers are warm and quite pleasant. Winters are cold and there can be lots of snow--but it's still a popular time to be Vienna because of the wide variety of cultural activities in the colder months.
The best time for visiting is really between April and October.
The charts below show the historic high and low temperatures and the month by month average precipitation for Vienna, Austria.
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