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Average Weather in March in Port Aransas Texas, United States

In Port Aransas, the month of March is characterized by rising daily high temperatures, with daily highs increasing by 5°F, from 69°F to 74°F over the course of the month, and rarely exceeding 79°F or dropping below 60°F.

Daily low temperatures increase by 7°F, from 57°F to 64°F, rarely falling below 47°F or exceeding 71°F.

For reference, on August 13, the hottest day of the year, temperatures in Port Aransas typically range from 81°F to 89°F, while on January 5, the coldest day of the year, they range from 51°F to 63°F.

Average High and Low Temperature in March

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on March. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in March

Average Hourly Temperature in March in Port Aransas18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMFebAprwarmcoolcomfortablecold
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.


The month of March in Port Aransas experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 41% throughout the month.

The clearest day of the month is March 31, with clear, mostly clear, or partly cloudy conditions 61% of the time.

For reference, on August 10, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 57%, while on June 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 74%.

Cloud Cover Categories in March

Cloud Cover Categories in March in Port Aransas1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FebAprMar 158%Mar 158%Mar 3161%Mar 3161%Mar 1160%Mar 1160%Mar 2159%Mar 2159%clearmostly clearpartly cloudyovercastmostly cloudy
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.


A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Port Aransas, the chance of a wet day over the course of March is essentially constant, remaining around 16% throughout.

For reference, the year's highest daily chance of a wet day is 35% on September 11, and its lowest chance is 13% on February 21.

Probability of Precipitation in March

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).


To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during March in Port Aransas is essentially constant, remaining about 1.8 inches throughout, and rarely exceeding 4.1 inches or falling below 0.1 inches.

Average Monthly Rainfall in March

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.


Over the course of March in Port Aransas, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 50 minutes, implying an average daily increase of 1 minute, 40 seconds, and weekly increase of 11 minutes, 37 seconds.

The shortest day of the month is March 1, with 11 hours, 36 minutes of daylight and the longest day is March 31, with 12 hours, 26 minutes of daylight.

Hours of Daylight and Twilight in March

Hours of Daylight and Twilight in March in Port Aransas1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrFebAprMar 2012 hr, 6 minMar 2012 hr, 6 minnightnightdaydayMar 111 hr, 36 minMar 111 hr, 36 min
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Port Aransas is 6:41 AM on March 11 and the latest sunrise is 59 minutes later at 7:40 AM on March 12.

The earliest sunset is 6:28 PM on March 1 and the latest sunset is 1 hour, 17 minutes later at 7:45 PM on March 31.

Daylight saving time (DST) starts at 3:00 AM on March 12, 2017, shifting sunrise and sunset to be an hour later.

For reference, on June 21, the longest day of the year, the Sun rises at 6:32 AM and sets 13 hours, 54 minutes later, at 8:27 PM, while on December 21, the shortest day of the year, it rises at 7:15 AM and sets 10 hours, 23 minutes later, at 5:37 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in March

The solar day over the course of March. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.


We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Port Aransas is very rapidly increasing during March, rising from 23% to 47% over the course of the month.

For reference, on July 16, the muggiest day of the year, there are muggy conditions 100% of the time, while on January 28, the least muggy day of the year, there are muggy conditions 9% of the time.

Humidity Comfort Levels in March

Humidity Comfort Levels in March in Port Aransas1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%10%20%30%40%50%60%70%80%90%100%FebAprMar 123%Mar 123%Mar 3147%Mar 3147%Mar 1130%Mar 1130%Mar 2140%Mar 2140%miserablemiserabledrydryhumidhumidmuggymuggyoppressiveoppressivecomfortablecomfortable
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.


This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Port Aransas is essentially constant during March, remaining within 0.1 miles per hour of 6.9 miles per hour throughout.

For reference, on April 26, the windiest day of the year, the daily average wind speed is 7.1 miles per hour, while on August 29, the calmest day of the year, the daily average wind speed is 5.6 miles per hour.

Average Wind Speed in March

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in Port Aransas throughout March is predominantly from the south, with a peak proportion of 43% on March 27.

Wind Direction in March

Wind Direction in March in Port Aransas1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FebAprsouthnortheastwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Water Temperature

Port Aransas is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Port Aransas is gradually increasing during March, rising by 3°F, from 65°F to 68°F, over the course of the month.

Average Water Temperature in March

The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Port Aransas is increasing during March, rising by 1.0 kWh, from 4.8 kWh to 5.9 kWh, over the course of the month.

Average Daily Incident Shortwave Solar Energy in March

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.


For the purposes of this report, the geographical coordinates of Port Aransas are 27.834 deg latitude, -97.061 deg longitude, and 0 ft elevation.

The topography within 2 miles of Port Aransas is essentially flat, with a maximum elevation change of 20 feet and an average elevation above sea level of 2 foot. Within 10 miles is also essentially flat (39 feet). Within 50 miles is essentially flat (194 feet).

The area within 2 miles of Port Aransas is covered by water (47%), artificial surfaces (20%), bare soil (11%), and grassland (10%), within 10 miles by water (79%), and within 50 miles by water (56%) and cropland (28%).

Data Sources

This report illustrates the typical weather in Port Aransas year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Port Aransas.

For each station, the records are corrected for the elevation difference between that station and Port Aransas according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Port Aransas is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Port Aransas and a given station.

The stations contributing to this reconstruction are: Mustang Beach Airport (95%, 3.7 kilometers, southwest) and Aransas County Airport (4.6%, 28 kilometers, north).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.