This report describes the typical weather at the Portela Airport (Lisbon Airport) (Lisbon, Portugal) weather station over the course of an average February. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Lisbon has a mediterranean climate with dry hot summers and mild winters. The area within 25 mi of this station is covered by shrublands (35%), croplands (31%), oceans and seas (30%), and built-up areas (3%).
The month of February is characterized by gradually rising daily high temperatures, with daily highs around 60°F throughout the month, exceeding 68°F or dropping below 54°F only one day in ten.
Over the course of February, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 1:05 hours, implying an average day-over-day increase of 2.2 minutes.
The shortest day of the month is February 1 with 10:14 hours of daylight; the longest day is February 29 with 11:18 hours of daylight.
The earliest sunrise is at 7:10am on February 29; the latest sunset is at 6:29pm on February 29; the latest sunrise is at 7:44am on February 1; the earliest sunset is at 5:57pm on February 1.
Daylight savings time is observed in 2012 but it neither starts nor ends in February, so the entire month is in standard time.
The median cloud cover is 57% (partly cloudy) and does not vary substantially over the course of the month.
On February 15, a representative day, the sky is clear or mostly clear 27% of the time, partly cloudy 21% of the time, and mostly cloudy or overcast 25% of the time.
The average probability that some form of precipitation will be observed in a given day is 44%, with little variation over the course of the month.
Throughout February, the most common forms of precipitation are moderate rain, light rain, and drizzle.
Moderate rain is the most severe precipitation observed during 47% of those days with precipitation. It is most likely around February 7, when it is observed during 22% of all days.
Light rain is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around February 1, when it is observed during 13% of all days.
Drizzle is the most severe precipitation observed during 13% of those days with precipitation. It is most likely around February 1, when it is observed during 6% of all days.
Either snow is exceptionally unlikely to fall at this location in February or this station does not reliably report precipitation types.
The relative humidity typically ranges from 58% (mildly humid) to 95% (very humid) over the course of a typical February, rarely dropping below 38% (comfortable) and reaching as high as 100% (very humid).
The air is driest around February 29, at which time the relative humidity drops below 69% (mildly humid) three days out of four; it is most humid around February 1, rising above 92% (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 February, the dew point typically varies from 41°F (dry) to 51°F (very comfortable) and is rarely below 31°F (dry) or above 58°F (comfortable).
Over the course of February typical wind speeds vary from 2 mph to 14 mph (light air to moderate breeze), rarely exceeding 22 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around February 18, at which time the average daily maximum wind speed is 14 mph (moderate breeze).
The lowest average wind speed of 8 mph (gentle breeze) occurs around February 1, at which time the average daily maximum wind speed is 13 mph (moderate breeze).