Temperature extremes in Vienna vary between summer highs of 95°F and - 4°F in winter. October may be damp and rainy, and light snowfalls occur in November and December. Snow, sometimes heavy, and frost can occur from January until mid-March. April, May, and early June offer pleasant spring weather, and summers are often delightful.
Vienna sometimes becomes uncomfortably hot in July and August, especially in the city's center, but the suburbs, particularly those which are elevated, are pleasant. The city is subject to rapid and marked changes in atmospheric pressures with accompanying winds. One such wind, the foehn, carries warm air from the south. It has a special meaning for the Viennese since many people blame it for peculiar human behavior. The average annual precipitation in Vienna is 21.02 inches.
The mountainous regions have long, cold winters with heavy snowfall and bright, crisp days. The Danube Basin usually has less snow, is damper, and therefore has more gray and overcast days than the higher altitudes.
In the west and south mostly mountains (Alps); along the eastern and northern margins mostly flat or gently sloping
Oil, coal, lignite, timber, iron ore, copper, zinc, antimony, magnesite, tungsten, graphite, salt, hydropower
Landslides; avalanches; earthquakes
452 Square Miles
1,170 Square Kilometers
Some forest degradation is caused by air and soil pollution; soil pollution results from the use of agricultural chemicals; air pollution results from emissions by coal- and oil-fired power stations and industrial plants and from trucks transiting Austria between northern and southern Europe
Environment - International Agreements:
Party To: Air Pollution, Air Pollution-Nitrogen Oxides, Air Pollution-Persistent Organic Pollutants, Air Pollution-Sulfur 85, Air Pollution-Sulphur 94, Air Pollution-Volatile Organic Compounds, Antarctic Treaty, Biodiversity, Climate Change, Climate Change-Kyoto Protocol, Desertification, Endangered Species, Environmental Modification, Hazardous Wastes, Law of the Sea, Ozone Layer Protection, Ship Pollution, Tropical Timber 83, Tropical Timber 94, Wetlands, Whaling
signed, but not ratified: none of the selected agreements