This report describes the typical weather at the Dublin International Airport (Dublin, Ireland) weather station over the course of an average August. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Dublin has a mild humid temperate climate with warm summers and no dry season. The area within 25 mi of this station is covered by grasslands (53%), oceans and seas (39%), built-up areas (4%), and croplands (3%).
The month of August is characterized by gradually falling daily high temperatures, with daily highs around 65°F throughout the month, exceeding 71°F or dropping below 59°F only one day in ten.
Over the course of August, the length of the day is rapidly decreasing. From the start to the end of the month, the length of the day decreases by 1:55 hours, implying an average day-over-day decrease of 3.7 minutes.
The shortest day of the month is August 31 with 13:42 hours of daylight; the longest day is August 1 with 15:38 hours of daylight.
The earliest sunrise is at 5:42am on August 1; the latest sunset is at 9:20pm on August 1; the latest sunrise is at 6:33am on August 31; the earliest sunset is at 8:16pm on August 31.
Daylight savings time is observed in 2012 but it neither starts nor ends in August, so the entire month is in daylight time.
The median cloud cover is 88% (mostly cloudy) and does not vary substantially over the course of the month.
On August 16, a representative day, the sky is clear or mostly clear 18% of the time, partly cloudy 20% of the time, and mostly cloudy or overcast 61% of the time.
The average probability that some form of precipitation will be observed in a given day is 74%, with little variation over the course of the month.
Throughout August, the most common forms of precipitation are moderate rain and light rain.
Moderate rain is the most severe precipitation observed during 74% of those days with precipitation. It is most likely around August 28, when it is observed during 55% of all days.
Light rain is the most severe precipitation observed during 14% of those days with precipitation. It is most likely around August 5, when it is observed during 11% of all days.
Either snow is exceptionally unlikely to fall at this location in August or this station does not reliably report precipitation types.
The relative humidity typically ranges from 62% (mildly humid) to 96% (very humid) over the course of a typical August, rarely dropping below 50% (mildly humid) and reaching as high as 100% (very humid).
The air is driest around August 18, at which time the relative humidity drops below 69% (mildly humid) three days out of four; it is most humid around August 5, rising above 94% (very 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 August, the dew point typically varies from 48°F (dry) to 57°F (comfortable) and is rarely below 42°F (dry) or above 62°F (mildy humid).
The time of the month between August 1 and August 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of August typical wind speeds vary from 3 mph to 16 mph (light air to moderate breeze), rarely exceeding 25 mph (strong breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around August 31, at which time the average daily maximum wind speed is 16 mph (moderate breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around August 4, at which time the average daily maximum wind speed is 15 mph (moderate breeze).