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Average Temperatures
- *January*: 0°C (32°F)
- *April*: 10°C (50°F)
- *July*: 20°C (68°F)
- *October*: 10°C (50°F)
Precipitation
Vienna receives an average of 600 mm (24 inches) of precipitation per year. The rainiest months are May, June, and July. Snowfall is common in winter, but it usually does not accumulate to more than a few centimeters.
Climate Variability
Vienna's climate is variable from year to year. For example, the average temperature in January can range from -10°C (14°F) to 10°C (50°F). The amount of precipitation can also vary significantly from year to year.
The Köppen Climate Classification
Vienna's climate is classified as Cfb, which is a temperate continental climate. This classification is based on the average temperature of the coldest month (0°C) and the average temperature of the warmest month (20°C).
Extreme Weather
Vienna is occasionally affected by extreme weather events. These include:
- Heat waves: Heat waves occur when the temperature reaches or exceeds 30°C (86°F) for at least three consecutive days. Heat waves can be dangerous, especially for the elderly and the sick.
- Cold waves: Cold waves occur when the temperature drops to or below -10°C (14°F) for at least three consecutive days. Cold waves can also be dangerous, especially for the elderly and the sick.
- Floods: Floods occur when rivers or streams overflow their banks and flood the surrounding area. Floods can cause damage to property and infrastructure, and can also be dangerous to human life.
- Tornadoes: Tornadoes are rare in Vienna, but they can occur. Tornadoes can cause severe damage to property and infrastructure, and can also be dangerous to human life.
Climate Change
Climate change is expected to have a significant impact on Vienna's climate. The average temperature is expected to increase by 1-2°C (1.8-3.6°F) by the end of the century. The amount of precipitation is also expected to increase, and the frequency and severity of extreme weather events is expected to increase.