This report describes the typical weather at the Dublin International Airport (Dublin, Ireland) weather station over the course of an average October. 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 October is characterized by falling daily high temperatures, with daily highs decreasing from 59°F to 53°F over the course of the month, exceeding 64°F or dropping below 48°F only one day in ten.
Over the course of October, the length of the day is very rapidly decreasing. From the start to the end of the month, the length of the day decreases by 2:02 hours, implying an average day-over-day decrease of 3.9 minutes.
The shortest day of the month is October 31 with 9:31 hours of daylight; the longest day is October 1 with 11:33 hours of daylight.
The earliest sunrise is at 7:18am on October 28; the latest sunset is at 7:00pm on October 1; the latest sunrise is at 8:15am on October 27; the earliest sunset is at 4:54pm on October 31.
Daylight savings time (DST) ends at 1:00am on October 28, 2012, shifting sunrise and sunset to an hour earlier.
The median cloud cover is 88% (mostly cloudy) and does not vary substantially over the course of the month.
On October 16, a representative day, the sky is clear or mostly clear 21% of the time, partly cloudy 17% of the time, and mostly cloudy or overcast 60% of the time.
The average probability that some form of precipitation will be observed in a given day is 77%, with little variation over the course of the month.
Throughout October, the most common forms of precipitation are moderate rain and light rain.
Moderate rain is the most severe precipitation observed during 76% of those days with precipitation. It is most likely around October 19, when it is observed during 59% of all days.
Light rain is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around October 28, when it is observed during 11% of all days.
Either snow is exceptionally unlikely to fall at this location in October or this station does not reliably report precipitation types.
The relative humidity typically ranges from 67% (mildly humid) to 95% (very humid) over the course of a typical October, rarely dropping below 54% (mildly humid) and reaching as high as 100% (very humid).
The air is driest around October 1, at which time the relative humidity drops below 75% (humid) three days out of four; it is most humid around October 1, rising above 93% (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 October, the dew point typically varies from 39°F (dry) to 52°F (very comfortable) and is rarely below 33°F (dry) or above 58°F (comfortable).
Over the course of October typical wind speeds vary from 4 mph to 19 mph (light breeze to fresh breeze), rarely exceeding 29 mph (strong breeze).
The highest average wind speed of 12 mph (moderate breeze) occurs around October 31, at which time the average daily maximum wind speed is 19 mph (fresh breeze).
The lowest average wind speed of 11 mph (gentle breeze) occurs around October 5, at which time the average daily maximum wind speed is 17 mph (moderate breeze).