This report describes the typical weather at the Dublin International Airport (Dublin, Ireland) weather station over the course of an average July. 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 July is characterized by essentially constant 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 July, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 1:13 hours, implying an average day-over-day decrease of 2.4 minutes.
The shortest day of the month is July 31 with 15:42 hours of daylight; the longest day is July 1 with 16:55 hours of daylight.
The earliest sunrise is at 5:01am on July 1; the latest sunset is at 9:57pm on July 1; the latest sunrise is at 5:39am on July 31; the earliest sunset is at 9:21pm on July 31.
Daylight savings time is observed in 2012 but it neither starts nor ends in July, so the entire month is in daylight time.
The median cloud cover is 89% (mostly cloudy) and does not vary substantially over the course of the month.
On July 16, a representative day, the sky is clear or mostly clear 16% of the time, partly cloudy 19% of the time, and mostly cloudy or overcast 63% 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 July, the most common forms of precipitation are moderate rain and light rain.
Moderate rain is the most severe precipitation observed during 73% of those days with precipitation. It is most likely around July 25, 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 July 30, when it is observed during 11% of all days.
Either snow is exceptionally unlikely to fall at this location in July 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 July, rarely dropping below 48% (comfortable) and reaching as high as 100% (very humid).
The air is driest around July 1, at which time the relative humidity drops below 69% (mildly humid) three days out of four; it is most humid around July 30, 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 July, the dew point typically varies from 47°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 July 1 and July 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of July typical wind speeds vary from 3 mph to 16 mph (light air to moderate breeze), rarely exceeding 23 mph (fresh breeze).
The highest average wind speed of 10 mph (gentle breeze) occurs around July 1, at which time the average daily maximum wind speed is 15 mph (moderate breeze).
The lowest average wind speed of 9 mph (gentle breeze) occurs around July 31, at which time the average daily maximum wind speed is 15 mph (moderate breeze).