Spring Weather at Klagenfurt Airport Austria

Daily high temperatures increase by 27°F, from 45°F to 72°F, rarely falling below 34°F or exceeding 83°F.

Daily low temperatures increase by 24°F, from 26°F to 51°F, rarely falling below 15°F or exceeding 58°F.

For reference, on July 30, the hottest day of the year, temperatures at Klagenfurt Airport typically range from 57°F to 79°F, while on January 13, the coldest day of the year, they range from 20°F to 33°F.

The figure below shows you a compact characterization of the hourly average spring temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Armstrong, Canada (5,185 miles away) and Terra Alta, United States (4,481 miles) are the far-away foreign places with temperatures most similar to Klagenfurt Airport (view comparison).

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The spring at Klagenfurt Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 55% throughout the season. The highest chance of overcast or mostly cloudy conditions is 59% on April 4.

The clearest day of the spring is May 31, with clear, mostly clear, or partly cloudy conditions 49% of the time.

For reference, on November 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 62%, while on July 21, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 65%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Klagenfurt Airport, the chance of a wet day over the course of the spring is very rapidly increasing, starting the season at 15% and ending it at 37%.

For reference, the year's highest daily chance of a wet day is 42% on June 11, and its lowest chance is 13% on January 14.

Over the course of the spring at Klagenfurt Airport, the chance of a day with only rain increases from 10% to 37%, the chance of a day with mixed snow and rain decreases from 4% to 0%, and the chance of a day with only snow decreases from 2% to 0%.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the spring at Klagenfurt Airport is very rapidly increasing, starting the season at 1.0 inches, when it rarely exceeds 2.3 inches or falls below 0.1 inches, and ending the season at 3.3 inches, when it rarely exceeds 4.9 inches or falls below 1.8 inches.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during the spring at Klagenfurt Airport is decreasing, starting the season at 2.8 inches, when it rarely exceeds 8.8 inches, and ending the season at 0.0 inches, when it rarely exceeds 0.0 inches or falls below -0.0 inches.

Over the course of the spring at Klagenfurt Airport, the length of the day is very rapidly increasing. From the start to the end of the season, the length of the day increases by 4 hours, 27 minutes, implying an average daily increase of 2 minutes, 56 seconds, and weekly increase of 20 minutes, 34 seconds.

The shortest day of the spring is March 1, with 11 hours, 7 minutes of daylight and the longest day is May 31, with 15 hours, 35 minutes of daylight.

The latest sunrise of the spring at Klagenfurt Airport is 6:43 AM on March 31 and the earliest sunrise is 1 hour, 30 minutes earlier at 5:13 AM on May 31.

The earliest sunset is 5:48 PM on March 1 and the latest sunset is 2 hours, 59 minutes later at 8:48 PM on May 31.

Daylight saving time (DST) ends at 3:00 AM on March 31, 2024, shifting sunrise and sunset to be an hour earlier.

For reference, on June 20, the longest day of the year, the Sun rises at 5:09 AM and sets 15 hours, 51 minutes later, at 8:59 PM, while on December 21, the shortest day of the year, it rises at 7:44 AM and sets 8 hours, 33 minutes later, at 4:17 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the spring of 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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 chance that a given day will be muggy at Klagenfurt Airport is essentially constant during the spring, remaining around 0% throughout.

For reference, on July 25, the muggiest day of the year, there are muggy conditions 2% of the time, while on September 25, the least muggy day of the year, there are muggy conditions 0% of the time.

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 at Klagenfurt Airport is gradually decreasing during the spring, decreasing from 4.3 miles per hour to 3.5 miles per hour over the course of the season.

For reference, on February 5, the windiest day of the year, the daily average wind speed is 4.4 miles per hour, while on August 9, the calmest day of the year, the daily average wind speed is 3.0 miles per hour.

The wind direction at Klagenfurt Airport during the spring is predominantly out of the north from March 1 to March 8 and from March 27 to April 27, the west from March 8 to March 27, and the south from April 27 to May 31.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season at Klagenfurt Airport typically lasts for 6.2 months (190 days), from around April 14 to around October 22, rarely starting before March 26 or after May 4, and rarely ending before October 3 or after November 10.

During the spring at Klagenfurt Airport, the chance that a given day is within the growing season is very rapidly increasing rising from 0% to 99% over the course of the season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days at Klagenfurt Airport are increasing during the spring, increasing by 414°F, from 4°F to 418°F, over the course of the season.

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 at Klagenfurt Airport is very rapidly increasing during the spring, rising by 3.1 kWh, from 3.2 kWh to 6.3 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Klagenfurt Airport are 46.645 deg latitude, 14.327 deg longitude, and 1,457 ft elevation.

The topography within 2 miles of Klagenfurt Airport contains very significant variations in elevation, with a maximum elevation change of 1,024 feet and an average elevation above sea level of 1,547 feet. Within 10 miles contains very significant variations in elevation (4,003 feet). Within 50 miles also contains extreme variations in elevation (9,281 feet).

The area within 2 miles of Klagenfurt Airport is covered by artificial surfaces (45%), cropland (30%), and trees (25%), within 10 miles by trees (44%) and cropland (38%), and within 50 miles by trees (64%) and grassland (14%).