Average Weather In March For San Salvador, El Salvador

Location

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%).

Temperature

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.

Daily High and Low Temperature in March

The daily average low (blue) and high (red) temperature with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
Daily low temperatures are around 73°F, falling below 68°F or exceeding 77°F only one day in ten.

Fraction of Time Spent in Various Temperature Bands in March

The average fraction of time spent in various temperature bands: frigid (below 15°F), freezing (15°F to 32°F), cold (32°F to 50°F), cool (50°F to 65°F), comfortable (65°F to 75°F), warm (75°F to 85°F), hot (85°F to 100°F) and sweltering (above 100°F).

Sun

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.

Daily Hours of Daylight and Twilight in March

The number of hours during which the Sun is visible (black line), with various degrees of daylight, twilight, and night, indicated by the color bands. From bottom (most yellow) to top (most gray): full daylight, solar twilight (Sun is visible but less than 6° from the horizon), civil twilight (Sun is not visible but is less than 6° below the horizon), nautical twilight (Sun is between 6° and 12° below the horizon), astronomical twilight (Sun is between 12° and 18° below the horizon), and full night.

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.

Daily Sunrise & Sunset with Twilight in March

The solar day over the course of the year 2012 . From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (solar, civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Clouds

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.

Median Cloud Cover in March

The median daily cloud cover (black line) with percentile bands (inner band from 40th to 60th percentile, outer band from 25th to 75th percentile).

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.

Cloud Cover Types in March

The fraction of time spent in each of the five sky cover categories. From top (most blue) to bottom (most gray), the categories are clear, mostly clear, partly cloudy, mostly cloudy, and overcast. Pink indicates missing data. Outside of the United States clear skies are often reported ambiguously, leading them to be lumped in with the missing data.

Precipitation

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.

Probability of Precipitation at Some Point in the Day in March

The fraction of days in which various types of precipitation are observed. If more than one type of precipitation is reported in a given day, the more severe precipitation is counted. For example, if light rain is observed in the same day as a thunderstorm, that day counts towards the thunderstorm totals. The order of severity is from the top down in this graph, with the most severe at the bottom.

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.

Types of Precipitation Throughout March

Relative frequency of various types of precipitation over the course of a typical March.

Snow

Either snow is exceptionally unlikely to fall at this location in March or this station does not reliably report precipitation types.

Humidity

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.

Relative Humidity in March

The average daily high (blue) and low (brown) relative humidity with percentile bands (inner bands from 25th to 75th percentile, outer bands from 10th to 90th percentile).

Dew Point

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).

Dew Point in March

The daily average low (blue) and high (red) dew point with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).

Wind

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).

Wind Speed in March

The average daily minimum (red), maximum (green), and average (black) wind speed with percentile bands (inner band from 25th to 75th percentile, outer band from 10th to 90th percentile).
The wind is most often out of the north east (13% of the time), north (12% of the time), and south west (11% of the time). The wind is least often out of the north west (3% of the time) and south east (5% of the time).

Wind Directions in March

The fraction of time spent with the wind blowing from the various directions over the entire year. Values do not sum to 100% because the wind direction is undefined when the wind speed is zero.

Fraction of Time Spent with Various Wind Directions in March

The fraction of time spent with the wind blowing from the various directions on a daily basis. Stacked values do not always sum to 100% because the wind direction is undefined when the wind speed is zero.