This report describes the typical weather at the Athens International Airport (Eleftherios Venizelos) (Athens (Athina), Greece) weather station over the course of an average May. It is based on the historical records from 2004 to 2012. Earlier records are either unavailable or unreliable.
Athens (Athina) has a mediterranean climate with dry hot summers and mild winters. The area within 25 mi of this station is covered by oceans and seas (56%), croplands (35%), shrublands (5%), and built-up areas (3%).
The month of May is characterized by rapidly rising daily high temperatures, with daily highs increasing from 71°F to 80°F over the course of the month, exceeding 86°F or dropping below 64°F only one day in ten.
Over the course of May, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 49 minutes, implying an average day-over-day increase of 1.6 minutes.
The shortest day of the month is May 1 with 13:48 hours of daylight; the longest day is May 31 with 14:37 hours of daylight.
The earliest sunrise is at 6:04am on May 31; the latest sunset is at 8:41pm on May 31; the latest sunrise is at 6:28am on May 1; the earliest sunset is at 8:15pm on May 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in May, so the entire month is in daylight time.
The median cloud cover ranges from 44% (partly cloudy) to 59% (partly cloudy). The trend is for the sky to be clearing with the median cloud cover decreasing by 14% from the start to the end of the month.
On May 31, the clearest day of the month, the sky is clear, mostly clear, or partly cloudy 53% of the time, and overcast or mostly cloudy 21% of the time.
On May 1, the cloudiest day of the month, the sky is overcast, mostly cloudy, or partly cloudy 54% of the time, and clear or mostly clear 29% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around May 1, occurring in 23% of days. Precipitation is least likely around May 31, occurring in 17% of days.
Throughout May, the most common forms of precipitation are light rain and thunderstorms.
Light rain is the most severe precipitation observed during 46% of those days with precipitation. It is most likely around May 18, when it is observed during 10% of all days.
Thunderstorms are the most severe precipitation observed during 35% of those days with precipitation. They are most likely around May 14, when it is observed during 8% of all days.
Either snow is exceptionally unlikely to fall at this location in May or this station does not reliably report precipitation types.
The relative humidity typically ranges from 34% (comfortable) to 79% (humid) over the course of a typical May, rarely dropping below 23% (dry), or exceeding 92% (very humid).
The air is driest around May 16, at which time the relative humidity drops below 40% (comfortable) three days out of four; it is most humid around May 11, rising above 74% (humid) three days out of four.
Dew point is often a better measure of how comfortable a person will find the weather than relative humidity because it more directly relates to whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid.
Over the course of a typical May, the dew point typically varies from 40°F (dry) to 57°F (comfortable) and is rarely below 33°F (dry) or above 61°F (comfortable).
The time of the month between May 1 and May 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of May typical wind speeds vary from 0 mph to 16 mph (calm to moderate breeze), rarely exceeding 23 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around May 1, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 7 mph (light breeze) occurs around May 29, at which time the average daily maximum wind speed is 15 mph (moderate breeze).