This report describes the typical weather at the Gimpo International Airport (Seoul, South Korea) weather station over the course of an average March. It is based on the historical records from 1974 to 2012. Earlier records are either unavailable or unreliable.
Seoul has a continental climate with dry winters and hot summers. The area within 25 mi of this station is covered by croplands (43%), oceans and seas (21%), forests (20%), built-up areas (7%), and grasslands (7%).
The month of March is characterized by rapidly rising daily high temperatures, with daily highs increasing from 44°F to 56°F over the course of the month, exceeding 64°F or dropping below 35°F only one day in ten.
Over the course of March, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 1:12 hours, implying an average day-over-day increase of 2.3 minutes.
The shortest day of the month is March 1 with 11:23 hours of daylight; the longest day is March 31 with 12:34 hours of daylight.
The earliest sunrise is at 6:20am on March 31; the latest sunset is at 6:54pm on March 31; the latest sunrise is at 7:04am on March 1; the earliest sunset is at 6:27pm on March 1.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover is 77% (partly cloudy) and does not vary substantially over the course of the month.
On March 16, a representative day, the sky is clear or mostly clear 10% of the time, partly cloudy 7% of the time, and mostly cloudy or overcast 20% of the time.
The average probability that some form of precipitation will be observed in a given day is 36%, with little variation over the course of the month.
Throughout March, the most common forms of precipitation are light rain, moderate rain, light snow, and moderate snow.
Light rain is the most severe precipitation observed during 34% of those days with precipitation. It is most likely around March 29, when it is observed during 14% of all days.
Moderate rain is the most severe precipitation observed during 28% of those days with precipitation. It is most likely around March 31, when it is observed during 13% of all days.
Light snow is the most severe precipitation observed during 19% of those days with precipitation. It is most likely around March 1, when it is observed during 10% of all days.
Moderate snow is the most severe precipitation observed during 12% of those days with precipitation. It is most likely around March 1, when it is observed during 6% of all days.
The likelihood of snow falling is highest around March 1, occurring in 17% of days.
Either snow rarely accumulates at this location in March or snow depth measurements are unavailable or unreliable.
The relative humidity typically ranges from 38% (comfortable) to 90% (very humid) over the course of a typical March, rarely dropping below 19% (dry) and reaching as high as 100% (very humid).
The air is driest around March 30, at which time the relative humidity drops below 49% (comfortable) three days out of four; it is most humid around March 23, rising above 83% (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 March, the dew point typically varies from 16°F (dry) to 39°F (dry) and is rarely below 2°F (dry) or above 48°F (dry).
Over the course of March typical wind speeds vary from 0 mph to 13 mph (calm to moderate breeze), rarely exceeding 19 mph (fresh breeze).
The highest average wind speed of 7 mph (light breeze) occurs around March 16, at which time the average daily maximum wind speed is 13 mph (moderate breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around March 1, at which time the average daily maximum wind speed is 12 mph (gentle breeze).