1. WeatherSpark.com
  2. United States
  3. Texas
  4. South Padre Island

September Weather in South Padre Island Texas, United States

Daily high temperatures decrease by 3°F, from 90°F to 86°F, rarely falling below 82°F or exceeding 93°F.

Daily low temperatures decrease by 3°F, from 79°F to 76°F, rarely falling below 69°F or exceeding 82°F.

For reference, on August 2, the hottest day of the year, temperatures in South Padre Island typically range from 79°F to 90°F, while on January 5, the coldest day of the year, they range from 55°F to 68°F.

Average High and Low Temperature in September in South Padre Island

Average High and Low Temperature in September in South Padre IslandSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303060°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°F100°F100°F105°F105°FAugOctSep 190°FSep 190°F79°F79°FSep 3086°FSep 3086°F76°F76°FSep 1189°FSep 1189°F78°F78°FSep 2188°FSep 2188°F77°F77°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 hourly average temperatures for the quarter of the year centered on September. 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 September in South Padre Island

Average Hourly Temperature in September in South Padre IslandSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMAugOctwarmhotcomfortablecomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Shenzhen, China (8,488 miles away) is the far-away foreign place with temperatures most similar to South Padre Island (view comparison).

Map
Marker
© OpenStreetMap contributors

Compare South Padre Island to another city:

Map

The month of September in South Padre Island experiences rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 58% to 43%.

The clearest day of the month is September 30, with clear, mostly clear, or partly cloudy conditions 57% of the time.

For reference, on August 21, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 60%, while on June 2, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 75%.

Cloud Cover Categories in September in South Padre Island

Cloud Cover Categories in September in South Padre IslandSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOctSep 142%Sep 142%Sep 3057%Sep 3057%Sep 1146%Sep 1146%Sep 2152%Sep 2152%clearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In South Padre Island, the chance of a wet day over the course of September is gradually decreasing, starting the month at 33% and ending it at 30%.

For reference, the year's highest daily chance of a wet day is 39% on September 14, and its lowest chance is 9% on February 21.

Probability of Precipitation in September in South Padre Island

Probability of Precipitation in September in South Padre IslandSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%5%5%10%10%15%15%20%20%25%25%30%30%35%35%40%40%AugOctSep 1339%Sep 1339%Sep 133%Sep 133%Sep 3030%Sep 3030%Sep 2134%Sep 2134%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 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 September in South Padre Island is essentially constant, remaining about 3.7 inches throughout, and rarely exceeding 8.1 inches or falling below 0.7 inches.

The highest average 31-day accumulation is 4.1 inches on September 17.

Average Monthly Rainfall in September in South Padre Island

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 snowfall.

Over the course of September in South Padre Island, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 44 minutes, implying an average daily decrease of 1 minute, 31 seconds, and weekly decrease of 10 minutes, 34 seconds.

The shortest day of the month is September 30, with 11 hours, 55 minutes of daylight and the longest day is September 1, with 12 hours, 38 minutes of daylight.

Hours of Daylight and Twilight in September in South Padre Island

Hours of Daylight and Twilight in September in South Padre IslandSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrAugOctSep 2212 hr, 8 minSep 2212 hr, 8 minnightnightdaydaySep 112 hr, 38 minSep 112 hr, 38 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 South Padre Island is 7:08 AM on September 1 and the latest sunrise is 12 minutes later at 7:20 AM on September 30.

The latest sunset is 7:47 PM on September 1 and the earliest sunset is 32 minutes earlier at 7:15 PM on September 30.

Daylight saving time is observed in South Padre Island during 2024, but it neither starts nor ends during September, so the entire month is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 6:37 AM and sets 13 hours, 47 minutes later, at 8:23 PM, while on December 21, the shortest day of the year, it rises at 7:11 AM and sets 10 hours, 30 minutes later, at 5:42 PM.

Sunrise & Sunset with Twilight in September in South Padre Island

Sunrise & Sunset with Twilight in September in South Padre IslandSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930302 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMAugOct7:08 AM7:08 AMSep 17:47 PMSep 17:47 PM7:20 AM7:20 AMSep 307:15 PMSep 307:15 PM7:13 AM7:13 AMSep 117:36 PMSep 117:36 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day over the course of September. 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 figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in September in South Padre Island

Solar Elevation and Azimuth in September in South Padre IslandSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMAugOct001010202020303040405050506070800001010202030303040405050606070
northeastsouthwest
Solar elevation and azimuth over the course of September 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for September 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in September in South Padre Island

Moon Rise, Set & Phases in September in South Padre IslandSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303012 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMAugOctAug 46:14 AMAug 46:14 AMAug 191:26 PMAug 191:26 PMSep 28:56 PMSep 28:56 PMSep 179:35 PMSep 179:35 PMOct 21:50 PMOct 21:50 PMOct 176:27 AMOct 176:27 AM6:57 AM6:57 AM8:44 PM8:44 PM7:37 PM7:37 PM6:47 AM6:47 AM6:42 AM6:42 AM7:49 PM7:49 PM7:26 PM7:26 PM7:46 AM7:46 AM7:12 AM7:12 AM7:14 PM7:14 PM6:31 PM6:31 PM7:36 AM7:36 AM
The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.
Sep 2024IlluminationMoonriseMoonsetMoonriseMeridian PassingDistance
1
2%5:48 AMENE7:18 PMWNW-12:35 PMS249,227 mi
2
0%6:42 AMENE7:49 PMW-1:17 PMS250,612 mi
3
0%7:34 AME8:17 PMW-1:57 PMS251,635 mi
4
3%8:25 AME8:44 PMW-2:36 PMS252,250 mi
5
7%9:16 AME9:11 PMW-3:14 PMS252,394 mi
6
12%10:07 AMESE9:40 PMWSW-3:53 PMS251,992 mi
7
20%10:59 AMESE10:11 PMWSW-4:35 PMS250,969 mi
8
28%11:54 AMESE10:46 PMWSW-5:19 PMS249,271 mi
9
37%12:51 PMESE11:26 PMWSW-6:08 PMS246,876 mi
10
48%1:49 PMESE--7:01 PMS243,821 mi
11
50%-12:13 AMWSW2:48 PMESE7:58 PMS240,213 mi
12
69%-1:08 AMWSW3:45 PMESE8:57 PMS236,247 mi
13
79%-2:09 AMWSW4:38 PMESE9:57 PMS232,200 mi
14
88%-3:15 AMWSW5:26 PMESE10:55 PMS228,417 mi
15
95%-4:23 AMWSW6:10 PMESE11:50 PMS225,261 mi
16
97%-5:31 AMWSW6:49 PMESE--
17
100%-6:39 AMW7:26 PME12:43 AMS223,062 mi
18
100%-7:46 AMW8:02 PME1:35 AMS222,057 mi
19
98%-8:53 AMW8:39 PMENE2:25 AMS222,346 mi
20
93%-10:01 AMWNW9:19 PMENE3:17 AMS223,872 mi
21
85%-11:10 AMWNW10:03 PMENE4:11 AMS226,436 mi
22
75%-12:18 PMWNW10:52 PMENE5:08 AMS229,739 mi
23
64%-1:24 PMWNW11:47 PMENE6:07 AMN233,441 mi
24
50%-2:25 PMWNW-7:06 AMN237,216 mi
25
42%12:45 AMENE3:20 PMWNW-8:04 AMN240,798 mi
26
32%1:46 AMENE4:06 PMWNW-8:58 AMS243,997 mi
27
23%2:45 AMENE4:46 PMWNW-9:48 AMS246,707 mi
28
15%3:42 AMENE5:21 PMWNW-10:34 AMS248,884 mi
29
8%4:37 AMENE5:52 PMWNW-11:17 AMS250,532 mi
30
4%5:30 AME6:20 PMW-11:57 AMS251,678 mi

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 South Padre Island is rapidly decreasing during September, falling from 100% to 84% over the course of the month.

For reference, on July 15, the muggiest day of the year, there are muggy conditions 100% of the time, while on January 24, the least muggy day of the year, there are muggy conditions 23% of the time.

Humidity Comfort Levels in September in South Padre Island

Humidity Comfort Levels in September in South Padre IslandSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%AugOctSep 1100%Sep 1100%Sep 3084%Sep 3084%Sep 1197%Sep 1197%Sep 2191%Sep 2191%miserablemiserableoppressiveoppressivemuggymuggyhumidhumiddrydrycomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 South Padre Island is increasing during September, increasing from 10.6 miles per hour to 11.6 miles per hour over the course of the month.

For reference, on April 25, the windiest day of the year, the daily average wind speed is 13.7 miles per hour, while on August 31, the calmest day of the year, the daily average wind speed is 10.5 miles per hour.

Average Wind Speed in September in South Padre Island

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 South Padre Island throughout September is predominantly from the east, with a peak proportion of 50% on September 7.

Wind Direction in September in South Padre Island

Wind Direction in September in South Padre IslandSESSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%20%80%40%60%60%40%80%20%100%0%AugOctsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

South Padre Island 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 South Padre Island is essentially constant during September, remaining within 1°F of 83°F throughout.

The highest average surface water temperature during September is 84°F on September 7.

Average Water Temperature in September in South Padre Island

Average Water Temperature in September in South Padre IslandSep11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303076°F76°F78°F78°F80°F80°F82°F82°F84°F84°F86°F86°FAugOctSep 784°FSep 784°FSep 3083°FSep 3083°FSep 2183°FSep 2183°F
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in South Padre Island are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Time Spent in Various Temperature Bands and the Growing Season in September in South Padre Island

Time Spent in Various Temperature Bands and the Growing Season in September in South Padre Islandgrowing seasonSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AugOct100%Sep 16100%Sep 16comfortablewarmhotcool
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in South Padre Island are very rapidly increasing during September, increasing by 932°F, from 5,940°F to 6,872°F, over the course of the month.

Growing Degree Days in September in South Padre Island

Growing Degree Days in September in South Padre IslandSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930305,800°F5,800°F6,000°F6,000°F6,200°F6,200°F6,400°F6,400°F6,600°F6,600°F6,800°F6,800°F7,000°F7,000°FAugOctSep 15,940°FSep 15,940°FSep 306,872°FSep 306,872°FSep 116,268°FSep 116,268°FSep 216,592°FSep 216,592°F
The average growing degree days accumulated over the course of September, with 25th to 75th and 10th to 90th percentile bands.

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 South Padre Island is essentially constant during September, remaining within 0.1 kWh of 5.1 kWh throughout.

Average Daily Incident Shortwave Solar Energy in September in South Padre Island

Average Daily Incident Shortwave Solar Energy in September in South Padre IslandSep1122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930300 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhAugOctSep 15.1 kWhSep 15.1 kWhSep 305.2 kWhSep 305.2 kWhSep 115.1 kWhSep 115.1 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.

For the purposes of this report, the geographical coordinates of South Padre Island are 26.104 deg latitude, -97.165 deg longitude, and 3 ft elevation.

The topography within 2 miles of South Padre Island is essentially flat, with a maximum elevation change of 10 feet and an average elevation above sea level of 0 feet. Within 10 miles is also essentially flat (30 feet). Within 50 miles is essentially flat (131 feet).

The area within 2 miles of South Padre Island is covered by water (84%) and bare soil (10%), within 10 miles by water (77%) and bare soil (17%), and within 50 miles by water (61%) and cropland (19%).

This report illustrates the typical weather in South Padre Island, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in South Padre Island.

For each station, the records are corrected for the elevation difference between that station and South Padre Island 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 South Padre Island is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between South Padre Island and a given station.

The stations contributing to this reconstruction are:

  • South Padre Island Heliport (KSPL, 89%, 2.7 mi, south, 10 ft elevation change)
  • Port Isabel, Port Isabel-Cameron County Airport (KPIL, 9%, 12 mi, west, 13 ft elevation change)
  • N Padre 975 (KOPM, 1.0%, 52 mi, north, 79 ft elevation change)

Sources mapKSPL, 89%3 mi, 10 ftKPIL, 9%12 mi, 13 ftKOPM, 1%52 mi, 79 ft© OpenStreetMap contributors

To get a sense of how much these sources agree with each other, you can view a comparison of South Padre Island and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.