Vienna, where it's located

The climate of Vienna is moderately continental, with cold winters and warm summers.
Vienna is the capital of Austria and is located in the far east of the country, on the plain crossed by the Danube, at just 200 meters (650 feet) of altitude.
In winter, during the coldest periods, the temperature can drop to -18/-20 °C (-4/0 °F), as happened in January 1985, January 1987, December 1996, and February 2012.
In summer, on the hottest days the temperature can reach, and sometimes even exceed, 35/36 °C (95/97 °F).
The average temperature of the coldest month (January) is of 0.7 °C (33 °F), that of the warmest month (July) is of 21.2 °C (70 °F). Here are the average temperatures.
Vienna - Average temperatures
Min (°C)-2-126111416161273-1
Max (°C)35101621242626201484
Min (°F)283036435257616154453730
Max (°F)374150617075797968574639

Precipitation amounts to 535 millimeters (21.1 inches) per year: so, it is not abundant. It ranges from 30 mm (1.2 in) in the driest months (January, February) to 60 mm (2.4 in) in the wettest ones (June, July). Here is the average precipitation.
Vienna - Average precipitation

On average, there are around 1,930 sunshine hours per year. Here are the average sunshine hours per day.
Vienna - Sunshine


Best Time

In order to avoid both the winter cold and the summer heat, the best times to visit Vienna are spring and autumn, and in particular, the months of May, June and September: daytime temperatures are pleasant, although it's better to bring a sweater and a jacket for the evening. In July and August, the temperature is usually not too hot, however, there is the risk of some very hot days, which can happen, though more rarely, also in the second half of June and in the first half of September.