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Average Weather at Brownsville-South Padre Island International Airport Texas, United States

At Brownsville-South Padre Island International Airport, the summers are long, hot, and oppressive; the winters are short, cool, dry, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 53°F to 94°F and is rarely below 40°F or above 97°F.

The hot season lasts for 4.0 months, from May 24 to September 24, with an average daily high temperature above 89°F. The hottest day of the year is August 4, with an average high of 94°F and low of 77°F.

The cool season lasts for 2.6 months, from December 4 to February 21, with an average daily high temperature below 75°F. The coldest day of the year is January 5, with an average low of 53°F and high of 70°F.

Average High and Low Temperature

Average High and Low Temperature at Brownsville-South Padre Island International AirporthotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F10°F20°F30°F40°F50°F60°F70°F80°F90°F100°F110°FJan 570°FJan 570°FAug 494°FAug 494°F53°F53°F77°F77°FMay 2489°FMay 2489°FSep 2489°FSep 2489°FDec 475°FDec 475°FFeb 2175°FFeb 2175°F74°F74°F73°F73°F57°F57°F57°F57°F
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 entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

Average Hourly Temperature at Brownsville-South Padre Island International AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM4 AM8 AM12 PM4 PM8 PM12 AMhotcoolwarmcomfortablecold
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.

Clouds

At Brownsville-South Padre Island International Airport, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year at Brownsville-South Padre Island International Airport begins around January 30 and lasts for 4.9 months, ending around June 27. On June 3, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 74% of the time, and overcast or mostly cloudy 26% of the time.

The cloudier part of the year begins around June 27 and lasts for 7.1 months, ending around January 30. On August 1, the cloudiest day of the year, the sky is overcast or mostly cloudy 60% of the time, and clear, mostly clear, or partly cloudy 40% of the time.

Cloud Cover Categories

Cloud Cover Categories at Brownsville-South Padre Island International AirportclearercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jun 374%Jun 374%Aug 140%Aug 140%Jan 3056%Jan 3056%Jun 2756%Jun 2756%clearmostly cloudyovercastmostly clearpartly 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.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days at Brownsville-South Padre Island International Airport varies significantly throughout the year.

The wetter season lasts 3.7 months, from June 22 to October 13, with a greater than 23% chance of a given day being a wet day. The chance of a wet day peaks at 38% on September 14.

The drier season lasts 8.3 months, from October 13 to June 22. The smallest chance of a wet day is 7% on February 21.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 38% on September 14.

Daily Chance of Precipitation

Daily Chance of Precipitation at Brownsville-South Padre Island International AirportwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Sep 1438%Sep 1438%Feb 217%Feb 217%Jan 110%Jan 110%Jun 2223%Jun 2223%Oct 1323%Oct 1323%rain
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).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Brownsville-South Padre Island International Airport experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year at Brownsville-South Padre Island International Airport. The most rain falls during the 31 days centered around September 17, with an average total accumulation of 4.2 inches.

The least rain falls around December 21, with an average total accumulation of 0.8 inches.

Average Monthly Rainfall

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.

Sun

The length of the day at Brownsville-South Padre Island International Airport varies over the course of the year. In 2017, the shortest day is December 21, with 10 hours, 31 minutes of daylight; the longest day is June 20, with 13 hours, 46 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight at Brownsville-South Padre Island International AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2013 hr, 46 minJun 2013 hr, 46 minJun 2012 hr, 7 minSep 2212 hr, 7 minSep 2210 hr, 31 minDec 2110 hr, 31 minDec 21nightnightday
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 is at 6:37 AM on June 9, and the latest sunrise is 1 hour, 4 minutes later at 7:41 AM on March 12. The earliest sunset is at 5:37 PM on November 29, and the latest sunset is 2 hours, 48 minutes later at 8:25 PM on July 2.

Daylight saving time (DST) is observed at Brownsville-South Padre Island International Airport during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time at Brownsville-South Padre Island International AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 96:37 AMJun 96:37 AM8:25 PMJul 28:25 PMJul 2Nov 295:37 PMNov 295:37 PM7:41 AMMar 127:41 AMMar 12Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnight
The solar day over the course of the year 2017. 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.

Humidity

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.

Brownsville-South Padre Island International Airport experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 8.4 months, from March 14 to November 27, during which time the comfort level is muggy, oppressive, or miserable at least 37% of the time. The muggiest day of the year is July 25, with muggy conditions 100% of the time.

The least muggy day of the year is January 22, with muggy conditions 15% of the time.

Humidity Comfort Levels

Humidity Comfort Levels at Brownsville-South Padre Island International AirportmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%10%20%30%40%50%60%70%80%90%100%Jan 2215%Jan 2215%100%Jul 25100%Jul 25Mar 1437%Mar 1437%Nov 2737%Nov 2737%oppressiveoppressivedrydrymuggymuggymiserablemiserablehumidhumidcomfortablecomfortable
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.

Wind

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 at Brownsville-South Padre Island International Airport experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 9.2 months, from October 26 to July 31, with average wind speeds of more than 6.0 miles per hour. The windiest day of the year is April 8, with an average hourly wind speed of 7.1 miles per hour.

The calmer time of year lasts for 2.8 months, from July 31 to October 26. The calmest day of the year is September 6, with an average hourly wind speed of 5.1 miles per hour.

Average Wind Speed

Average Wind Speed at Brownsville-South Padre Island International AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mphApr 87.1 mphApr 87.1 mphSep 65.1 mphSep 65.1 mphOct 266.0 mphOct 266.0 mphJul 316.1 mphJul 316.1 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction at Brownsville-South Padre Island International Airport varies throughout the year.

The wind is most often from the south for 7.8 months, from January 7 to September 2 and for 2.6 months, from October 9 to December 29, with a peak percentage of 75% on July 17. The wind is most often from the east for 1.2 months, from September 2 to October 9, with a peak percentage of 47% on September 8. The wind is most often from the north for 1.3 weeks, from December 29 to January 7, with a peak percentage of 40% on January 1.

Wind Direction

Wind Direction at Brownsville-South Padre Island International AirportSESJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%eastnorthsouth
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

Brownsville-South Padre Island International Airport 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 water temperature experiences some seasonal variation over the course of the year.

The time of year with warmer water lasts for 4.4 months, from June 4 to October 17, with an average temperature above 80°F. The day of the year with the warmest water is September 6, with an average temperature of 84°F.

The time of year with cooler water lasts for 3.3 months, from December 24 to April 4, with an average temperature below 70°F. The day of the year with the coolest water is February 20, with an average temperature of 66°F.

Average Water Temperature

Average Water Temperature at Brownsville-South Padre Island International AirportwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec60°F65°F70°F75°F80°F85°FSep 684°FSep 684°F66°FFeb 2066°FFeb 20Jun 480°FJun 480°FOct 1780°FOct 1780°FDec 2470°FDec 2470°FApr 470°FApr 470°F
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 experiences significant seasonal variation over the course of the year.

The brighter period of the year lasts for 2.7 months, from April 10 to July 1, with an average daily incident shortwave energy per square meter above 6.3 kWh. The brightest day of the year is June 3, with an average of 7.1 kWh.

The darker period of the year lasts for 2.5 months, from November 15 to February 2, with an average daily incident shortwave energy per square meter below 4.1 kWh. The darkest day of the year is December 31, with an average of 3.4 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy at Brownsville-South Padre Island International AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh1 kWh2 kWh3 kWh4 kWh5 kWh6 kWh7 kWh8 kWh9 kWhJun 37.1 kWhJun 37.1 kWhDec 313.4 kWhDec 313.4 kWhApr 106.3 kWhApr 106.3 kWhFeb 24.1 kWhFeb 24.1 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Brownsville-South Padre Island International Airport are 25.907 deg latitude, -97.426 deg longitude, and 16 ft elevation.

The topography within 2 miles of Brownsville-South Padre Island International Airport is essentially flat, with a maximum elevation change of 20 feet and an average elevation above sea level of 18 feet. Within 10 miles is essentially flat (98 feet). Within 50 miles also contains only modest variations in elevation (220 feet).

The area within 2 miles of Brownsville-South Padre Island International Airport is covered by artificial surfaces (95%), within 10 miles by artificial surfaces (44%) and grassland (33%), and within 50 miles by water (43%) and cropland (35%).

Data Sources

This report illustrates the typical weather at Brownsville-South Padre Island International Airport, 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

Brownsville-South Padre Island International Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back are Port Isabel, Port Isabel-Cameron County Airport; Rio Grande Valley International Airport; Mid Valley Airport; McAllen Miller International Airport; and Edinburg Rio Grande Valley Regional Freight Terminal Airport.

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.