Average Weather in Vienna Austria
In Vienna, the temperature typically varies from 27°F to 79°F over the course of the year, and is rarely below 13°F or above 89°F.
The warm season lasts for 3.4 months, from May 28 to September 10, with an average daily high temperature above 70°F. The hottest day of the year is August 5, with an average high of 79°F and low of 60°F.
The cold season lasts for 3.5 months, from November 18 to March 4, with an average daily high temperature below 45°F. The coldest day of the year is January 14, with an average low of 27°F and high of 36°F.
Average High and Low Temperature
The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.
Average Hourly Temperature
The length of the day in Vienna varies extremely over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 20 minutes of daylight; the longest day is June 21, with 16 hours, 5 minutes of daylight.
Hours of Daylight and Twilight
The earliest sunrise is at 4:53 AM on June 16, and the latest sunrise is 2 hours, 52 minutes later at 7:45 AM on January 1. The earliest sunset is at 4:00 PM on December 10, and the latest sunset is 4 hours, 59 minutes later at 8:59 PM on June 25.
Daylight saving time (DST) is observed in Vienna during 2017, starting in the spring on March 26, lasting 7.1 months, and ending in the fall on October 29.
Sunrise & Sunset with Twilight and Daylight Saving Time
In Vienna, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.
The clearer part of the year in Vienna begins around May 29 and lasts for 4.3 months, ending around October 7. On July 18, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 65% of the time, and overcast or mostly cloudy 35% of the time.
The cloudier part of the year begins around October 7 and lasts for 7.7 months, ending around May 29. On November 19, the cloudiest day of the year, the sky is overcast or mostly cloudy 62% of the time, and clear, mostly clear, or partly cloudy 38% of the time.
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Vienna varies throughout the year.
The wetter season lasts 4.4 months, from May 4 to September 16, with a greater than 24% chance of a given day being a wet day. The chance of a wet day peaks at 33% on June 13.
The drier season lasts 7.6 months, from September 16 to May 4. The smallest chance of a wet day is 14% on January 22.
Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 33% on June 13.
Daily Chance of Precipitation
To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day in the year. Vienna experiences some seasonal variation in monthly rainfall.
Rain falls throughout the year in Vienna. The most rain falls during the 31 days centered around July 19, with an average total accumulation of 2.4 inches.
The least rain falls around January 18, with and average total accumulation of 0.6 inches.
Average Monthly Rainfall
We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.
As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day in the year. Vienna experiences some seasonal variation in monthly liquid-equivalent snowfall.
The snowy period of the year lasts for 3.9 months, from November 16 to March 14, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around January 6, with an average total liquid-equivalent accumulation of 0.3 inches.
The snowless period of the year lasts for 8.1 months, from March 14 to November 16. The least snow falls around July 15, with an average total liquid-equivalent accumulation of 0.0 inches.
Average Liquid-Equivalent Monthly Snowfall
We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.
The perceived humidity level in Vienna, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, staying within 2% of 2% throughout.
Humidity Comfort Levels
This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.
The average hourly wind speed in Vienna experiences mildly seasonal variation over the course of the year.
The windier part of the year lasts for 5.0 months, from November 28 to April 27, with average wind speeds of more than 4.7 miles per hour. The windiest day of the year is February 5, with an average hourly wind speed of 5.5 miles per hour.
The calmer time of year lasts for 7.0 months, from April 27 to November 28. The calmest day of the year is August 11, with an average hourly wind speed of 3.9 miles per hour.
Average Wind Speed
The predominant average hourly wind direction in Vienna varies throughout the year.
The wind is most often from the north for 4.8 months, from March 25 to August 20 and for 1.4 weeks, from September 10 to September 20, with a peak percentage of 39% on July 23. The wind is most often from the west for 3.0 weeks, from August 20 to September 10 and for 3.9 months, from November 27 to March 25, with a peak percentage of 41% on January 1. The wind is most often from the south for 2.2 months, from September 20 to November 27, with a peak percentage of 40% on October 30.
This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.
The average daily incident shortwave solar energy experiences very significant seasonal variation over the course of the year.
The brighter period of the year lasts for 3.6 months, from April 30 to August 18, with an average daily incident shortwave energy per square meter above 5.6 kWh. The brightest day of the year is June 30, with an average of 6.7 kWh.
The darker period of the year lasts for 3.6 months, from October 28 to February 16, with an average daily incident shortwave energy per square meter below 2.2 kWh. The darkest day of the year is December 22, with an average of 1.0 kWh.
Average Daily Incident Shortwave Solar Energy
For the purposes of this report, the geographical coordinates of Vienna are 48.208 deg latitude, 16.372 deg longitude, and 607 ft elevation (map ).
The topography within 2 miles of Vienna contains only modest variations in elevation, with a maximum elevation change of 226 feet, and an average elevation above sea level of 598 feet. Within 10 miles contains very significant variations in elevation (1,434 feet). Within 50 miles contains extreme variations in elevation (6,414 feet).
The area within 2 miles of Vienna is covered by artificial surfaces (100%), within 10 miles by artificial surfaces (46%) and cropland (29%), and within 50 miles by cropland (52%) and trees (33%).
This report illustrates the typical weather in Vienna, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.
Temperature and Dew Point
There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Vienna.
For each station, the records are corrected for the elevation difference between that station and Vienna according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.
The estimated value at Vienna is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Vienna and a given station.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.
All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.
Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.
Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.
Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .
Time zones for aiports and weather stations are provided by AskGeo.com .