This report describes the typical weather at the Charleston International Airport (Charleston Air Force Base) (Charleston, South Carolina, United States) 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.
Charleston, South Carolina has a warm humid temperate climate with hot summers and no dry season. The area within 25 mi of this station is covered by forests (63%), oceans and seas (16%), croplands (12%), lakes and rivers (4%), and built-up areas (3%).
The month of February is characterized by rising daily high temperatures, with daily highs increasing from 59°F to 66°F over the course of the month, exceeding 77°F or dropping below 46°F only one day in ten.
Over the course of February, the length of the day is gradually increasing. From the start to the end of the month, the length of the day increases by 52 minutes, implying an average day-over-day increase of 1.8 minutes.
The shortest day of the month is February 1 with 10:36 hours of daylight; the longest day is February 29 with 11:28 hours of daylight.
The earliest sunrise is at 6:49am on February 29; the latest sunset is at 6:17pm on February 29; the latest sunrise is at 7:16am on February 1; the earliest sunset is at 5:52pm 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 ranges from 48% (partly cloudy) to 54% (partly cloudy).
On February 15, a representative day, the sky is clear or mostly clear 46% of the time, partly cloudy 11% of the time, and mostly cloudy or overcast 41% of the time.
The average probability that some form of precipitation will be observed in a given day is 38%, with little variation over the course of the month.
Throughout February, the most common forms of precipitation are light rain and moderate rain.
Light rain is the most severe precipitation observed during 41% of those days with precipitation. It is most likely around February 1, when it is observed during 17% of all days.
Moderate rain is the most severe precipitation observed during 37% of those days with precipitation. It is most likely around February 1, when it is observed during 15% 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 43% (comfortable) to 90% (very humid) over the course of a typical February, rarely dropping below 22% (dry) and reaching as high as 100% (very humid).
The air is driest around February 29, at which time the relative humidity drops below 55% (mildly humid) three days out of four; it is most humid around February 25, rising above 85% (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 30°F (dry) to 50°F (dry) and is rarely below 12°F (dry) or above 63°F (mildy humid).
Over the course of February typical wind speeds vary from 1 mph to 16 mph (light air to moderate breeze), rarely exceeding 23 mph (fresh breeze).
The highest average wind speed of 9 mph (gentle breeze) occurs around February 29, 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 February 1, at which time the average daily maximum wind speed is 15 mph (moderate breeze).