This report describes the typical weather at the El Salvador International Airport (San Salvador, El Salvador) weather station over the course of an average March. It is based on the historical records from 1996 to 2012. Earlier records are either unavailable or unreliable.
San Salvador has a tropical savanna climate with dry winters. The area within 25 mi of this station is covered by oceans and seas (38%), forests (29%), croplands (24%), and grasslands (5%).
The month of March is characterized by essentially constant daily high temperatures, with daily highs around 93°F throughout the month, exceeding 96°F or dropping below 89°F only one day in ten.
Over the course of March, the length of the day is essentially constant. The shortest day of the month is March 1 with 11:53 hours of daylight; the longest day is March 31 with 12:15 hours of daylight.
The earliest sunrise is at 5:53am on March 31; the latest sunset is at 6:08pm on March 30; the latest sunrise is at 6:12am on March 1; the earliest sunset is at 6:05pm on March 1.
Daylight saving time (DST) is not observed in 2012.
The median cloud cover ranges from 42% (partly cloudy) to 49% (partly cloudy). The trend is for the sky to be becoming cloudier with the median cloud cover increasing by 7% from the start to the end of the month.
On March 16, a representative day, the sky is clear or mostly clear 24% of the time, partly cloudy 11% of the time, and mostly cloudy or overcast 12% of the time.
The probability that precipitation will be observed at this location varies throughout the month. Precipitation is most likely around March 31, occurring in 14% of days. Precipitation is least likely around March 1, occurring in 5% of days.
Throughout March, the most common forms of precipitation are thunderstorms, light rain, drizzle, and moderate rain.
Thunderstorms are the most severe precipitation observed during 34% of those days with precipitation. They are most likely around March 31, when it is observed during 6% of all days.
Light rain is the most severe precipitation observed during 29% of those days with precipitation. It is most likely around March 31, when it is observed during 3% of all days.
Drizzle is the most severe precipitation observed during 18% of those days with precipitation. It is most likely around March 31, when it is observed during 2% of all days.
Moderate rain is the most severe precipitation observed during 18% of those days with precipitation. It is most likely around March 30, when it is observed during 3% of all days.
Either snow is exceptionally unlikely to fall at this location in March or this station does not reliably report precipitation types.
The relative humidity typically ranges from 37% (comfortable) to 91% (very humid) over the course of a typical March, rarely dropping below 24% (dry) and reaching as high as 100% (very humid).
The air is driest around March 1, at which time the relative humidity drops below 44% (comfortable) three days out of four; it is most humid around March 23, rising above 87% (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 March, the dew point typically varies from 59°F (comfortable) to 73°F (very muggy) and is rarely below 52°F (very comfortable) or above 76°F (oppressive).
Over the course of March typical wind speeds vary from 0 mph to 12 mph (calm to gentle breeze), rarely exceeding 18 mph (fresh breeze).
The highest average wind speed of 6 mph (light breeze) occurs around March 3, at which time the average daily maximum wind speed is 12 mph (gentle breeze).
The lowest average wind speed of 6 mph (light breeze) occurs around March 31, at which time the average daily maximum wind speed is 12 mph (gentle breeze).