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Average Weather at Athens Eleftherios Venizelos International Airport Greece

Athens Eleftherios Venizelos International Airport has a cold semi-arid steppe climate. The temperature typically varies from 41°F to 89°F over the course of the year, and is rarely below 33°F or above 95°F.

The hot season lasts for 100 days, from June 6 to September 14, with an average daily high temperature above 82°F. The hottest day of the year is July 31, with an average high of 89°F and low of 72°F.

The cool season lasts for 124 days, from November 24 to March 28, with an average daily high temperature below 62°F. The coldest day of the year is January 23, with an average low of 41°F and high of 55°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature with percentile bands, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

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

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecchillychillycoldcoldcoolcoolcomfortablecomfortablewarmwarmhothot
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Sun

The length of the day at Athens Eleftherios Venizelos International Airport varies significantly over the course of the year. In 2017, the shortest day is December 21, with 9 hours, 32 minutes of daylight; the longest day is June 21, with 14 hours, 48 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 6:01 AM on June 14, and the latest sunrise is 1 hour, 44 minutes later at 7:45 AM on October 28. The earliest sunset is at 5:04 PM on December 7, and the latest sunset is 3 hours, 46 minutes later at 8:50 PM on June 28.

Daylight saving time (DST) is observed at Athens Eleftherios Venizelos International Airport during 2017, starting in the spring on March 26, lasting 216 days, and ending in the fall on October 29.

Sunrise & Sunset with Twilight and Daylight Saving Time

The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Clouds

At Athens Eleftherios Venizelos International Airport, 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 at Athens Eleftherios Venizelos International Airport begins around May 27 and lasts for 124 days, ending around September 28. On July 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 99% of the time, and overcast or mostly cloudy 1% of the time.

The cloudier part of the year begins around September 28 and lasts for 241 days, ending around May 27. On December 13, the cloudiest day of the year, the sky is overcast or mostly cloudy 44% of the time, and clear, mostly clear, or partly cloudy 56% of the time.

Cloud Cover

clearerclearercloudiercloudiercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 1344%Dec 1344%Jul 231%Jul 231%May 2723%May 2723%Sep 2823%Sep 2823%overcastovercastmostly cloudymostly cloudypartly cloudypartly cloudymostly clearmostly clearclearclear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Athens Eleftherios Venizelos International Airport varies throughout the year.

The wetter season lasts 182 days, from October 15 to April 15, with a greater than 14% chance of a given day being a wet day. The chance of a wet day peaks at 25% on November 27.

The drier season lasts 183 days, from April 15 to October 15. The smallest chance of a wet day is 2% on July 25.

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 25% on November 27.

Daily Chance of Precipitation

wetwetwetwetdrydry0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecNov 2725%Nov 2725%Jul 252%Jul 252%Oct 1514%Oct 1514%Apr 1514%Apr 1514%rainrainmixedmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

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. Athens Eleftherios Venizelos International Airport experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 242 days, from September 19 to May 19, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around November 24, with an average total accumulation of 2.4 inches.

The rainless period of the year lasts for 123 days, from May 19 to September 19. The least rain falls around August 3, with and average total accumulation of 0.2 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Humidity

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 at Athens Eleftherios Venizelos International Airport, 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 5% of 5% throughout.

Humidity Comfort Levels

0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 170%Dec 170%Aug 910%Aug 910%comfortablecomfortabledrydrymuggymuggy
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

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 Athens Eleftherios Venizelos International Airport experiences mildly seasonal variation over the course of the year.

The windier part of the year lasts for 175 days, from October 3 to March 27, with average wind speeds of more than 5.5 miles per hour. The windiest day of the year is January 29, with an average hourly wind speed of 6.7 miles per hour.

The calmer time of year lasts for 190 days, from March 27 to October 3. The calmest day of the year is June 2, with an average hourly wind speed of 4.5 miles per hour.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction at Athens Eleftherios Venizelos International Airport is from the north throughout the year.

Wind Direction

0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestwestsouthsoutheasteastnorthnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Athens Eleftherios Venizelos International Airport is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 101 days, from June 25 to October 4, with an average temperature above 73°F. The day of the year with the warmest water is August 14, with an average temperature of 77°F.

The time of year with cooler water lasts for 135 days, from December 16 to April 30, with an average temperature below 62°F. The day of the year with the coolest water is March 2, with an average temperature of 58°F.

Average Water Temperature

The daily average water temperature (purple line) with percentile bands, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 108 days, from May 7 to August 23, with an average daily incident shortwave energy per square meter above 6.9 kWh. The brightest day of the year is July 6, with an average of 8.2 kWh.

The darker period of the year lasts for 107 days, from October 31 to February 15, with an average daily incident shortwave energy per square meter below 3.3 kWh. The darkest day of the year is December 22, with an average of 2.1 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

The area within 2 miles of Athens Eleftherios Venizelos International Airport is covered by artificial surfaces (36%), cropland (35%), and sparse vegetation (12%), within 10 miles by water (26%) and cropland (22%), and within 50 miles by water (66%).

The topography within 2 miles of Athens Eleftherios Venizelos International Airport contains only modest variations in elevation, with a maximum elevation change of 384 feet, and an average elevation above sea level of 250 feet. Within 10 miles contains extreme variations in elevation (3,369 feet). Within 50 miles also contains extreme variations in elevation (5,889 feet).

Data Sources

This report illustrates the typical weather at Athens Eleftherios Venizelos International Airport, 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

Athens Eleftherios Venizelos International Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back are Ellinikón Airport, Elefsis Airport, Tanagra Airport, Skiros Airport, Tripoli Airport, and Kalamata Airport.

Other Data

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 .