This report describes the typical weather at the Santiago de Compostela Airport (Santiago de Compostela, Spain) 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.
Santiago de Compostela 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 (99%).
The month of October is characterized by falling daily high temperatures, with daily highs decreasing from 68°F to 60°F over the course of the month, exceeding 78°F or dropping below 53°F only one day in ten.
Over the course of October, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 1:24 hours, implying an average day-over-day decrease of 2.7 minutes.
The shortest day of the month is October 31 with 10:19 hours of daylight; the longest day is October 1 with 11:43 hours of daylight.
The earliest sunrise is at 8:04am on October 28; the latest sunset is at 8:15pm on October 1; the latest sunrise is at 9:03am on October 27; the earliest sunset is at 6:27pm on October 31.
Daylight saving time (DST) ends at 2:00am on October 28, 2012, shifting sunrise and sunset to an hour earlier.
The median cloud cover ranges from 63% (partly cloudy) to 70% (partly cloudy). The trend is for the sky to be becoming cloudier with the median cloud cover increasing by 8% from the start to the end of the month.
On October 16, a representative day, the sky is clear or mostly clear 22% of the time, partly cloudy 28% of the time, and mostly cloudy or overcast 33% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around October 31, occurring in 60% of days. Precipitation is least likely around October 1, occurring in 50% of days.
Throughout October, the most common forms of precipitation are moderate rain, light rain, and drizzle.
Moderate rain is the most severe precipitation observed during 60% of those days with precipitation. It is most likely around October 31, when it is observed during 37% of all days.
Light rain is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around October 22, when it is observed during 8% of all days.
Drizzle is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around October 31, when it is observed during 7% 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 60% (mildly humid) to 98% (very humid) over the course of a typical October, rarely dropping below 37% (comfortable) and reaching as high as 100% (very humid).
The air is driest around October 1, at which time the relative humidity drops below 73% (humid) three days out of four; it is most humid around October 20, rising above 100% (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 44°F (dry) to 57°F (comfortable) and is rarely below 37°F (dry) or above 62°F (mildy humid).
The time of the month between October 1 and October 31 is the most comfortable, with dew points that are neither too dry nor too muggy.
Over the course of October typical wind speeds vary from 0 mph to 12 mph (calm to moderate breeze), rarely exceeding 20 mph (fresh breeze).
The highest average wind speed of 7 mph (light breeze) occurs around October 14, at which time the average daily maximum wind speed is 12 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around October 2, at which time the average daily maximum wind speed is 12 mph (gentle breeze).