September Weather in South Padre Island, United States

Last updated: February 24, 2025

Experience the enchanting September weather on South Padre Island, where temperatures average a pleasant 28°C (82°F), with highs reaching up to 31°C (88°F) and lows dipping to 24°C (75°F). This month brings about 136 mm (5.3 in) of precipitation over approximately 17 days, contributing to the island's lush landscapes and vibrant flora. With a humidity level of 77%, the air is infused with a tropical charm, making it an ideal time to enjoy the island's stunning beaches and diverse outdoor activities. Whether you’re soaking up the sun or exploring the local attractions, September on South Padre Island promises a delightful coastal experience.

September Temperature in South Padre Island

In September, South Padre Island welcomes a warmth that hints at the tail end of summer. With minimum temperatures hovering around 24°C (75°F) and an average of 28°C (82°F), the island maintains a balmy atmosphere that's perfect for beachgoers. The heat peaks with maximums reaching up to 31°C (88°F), mirroring the sultry days of August. This month signifies a transition, as the temperatures remain consistently high, but there's a subtle shift towards the cooler fall months ahead. The lingering warmth makes September an ideal time for outdoor adventures, beach activities, and soaking in the final rays of summer sunshine before autumn sets in.

September Weather in South Padre Island: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in South Padre Island, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec646469747982828382797267
Data source: Temperature data for South Padre Island generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in South Padre Island

In September, South Padre Island experiences a notable increase in precipitation, with an average of 136 mm (5.3 in) of rain falling over approximately 17 days. This surge marks the month as the wettest in the year, following the typically dry summer months. While July showcases substantial rainfall with 125 mm (4.9 in), September overcomes that, indicating a shift towards more humid conditions as summer transitions into fall. The increased number of rainy days compared to previous months highlights a change in weather patterns, preparing the island for the cooler, drier seasons ahead. This rhythm of precipitation underscores the dynamic climate of South Padre Island, where the lush landscape thrives on these September showers.

September Precipitation Trends in South Padre Island

The chart displays monthly precipitation patterns in South Padre Island, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec47364226688712532136947143
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in South Padre Island

In September, South Padre Island experiences a humidity level of 77%, maintaining a consistent trend seen throughout the summer months. This slight decline from the peak humidity of 85% in April sets the stage for a more comfortable climate as the region transitions into fall. Notably, the humidity gradually decreases from the summer high of 81% in March to its lowest point of 76% in October. Despite this reduction, September’s levels still reflect the overall tropical atmosphere typical of coastal areas, blending warmth with a touch of sea-breeze relief, making it an ideal time for outdoor activities against the backdrop of the beautiful Gulf Coast.

September Average Humidity in South Padre Island

This chart illustrates the average monthly humidity levels in South Padre Island, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec78%82%81%85%83%79%79%78%77%76%79%79%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in South Padre Island

In September, visitors to South Padre Island can expect an UV Index of 11, categorizing it as extreme and resulting in a burn time of just 10 minutes. This trend marks a slight drop from the sizzling peak of 12 seen during the height of summer in July and August. As the summer sun begins to wane, September still demands vigilance against UV radiation, reminding beachgoers to prioritize sun safety. This month, along with April and May, showcases some of the highest UV levels of the year, emphasizing the importance of protective measures when enjoying the outdoors. For detailed information about seasonal trends and safety tips, visit South Padre Island UV Index.

Maximum UV Index Levels in South Padre Island for September

The chart shows the monthly maximum UV Index (UVI) for South Padre Island in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec69101112121212111076
Data source: South Padre Island September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in South Padre Island

September in South Padre Island basks in a generous 293 hours of sunshine, making it a splendid time for sun-seekers to enjoy the late summer warmth. As summer reaches its finale, the sunshine hours slightly dip from the peak of 339 hours in August, yet still retain a vibrant glow. This month serves as a bridge between the sizzling summer and the mild autumn, showcasing the island's mix of sunny days and gentle breezes. With the average sunlight gradually decreasing as the year progresses, September offers an alluring blend of warmth and accessibility, perfect for those looking to escape into the sun-kissed shores before the cooler months set in.

Monthly Sunshine Duration in South Padre Island: September Highlighted

The September sunshine duration represents the total number of hours South Padre Island experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec183h221h274h288h328h332h334h339h293h300h250h245h
Data source: South Padre Island September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in South Padre Island During September

As September rolls in, South Padre Island basks in a promising 56% chance of sunny weather, tying with August for the sunniest month of the late summer season. This peak in sunshine likelihood marks a noticeable uplift from the earlier months, where the chances fluctuated between 37% and 50%. Following September, the sun's presence seems to hang on a bit longer into October, which boasts a 59% chance, hinting at a gentle transition into fall without sacrificing warmth. With favorable weather conditions and vibrant beach vibes, September emerges as a delightful time to revel in the natural beauty of South Padre Island.

Percentage of Sunny Days in September in South Padre Island

The chart illustrates the percentage of sunny days in South Padre Island throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often South Padre Island experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec40%37%47%44%50%48%39%56%56%59%52%50%
Data source: South Padre Island September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in South Padre Island in September

As September arrives in South Padre Island, the daylight begins to shift, offering 12 hours of sunlight each day. This marks the tail end of summer's enduring brightness, a noteworthy transition from the 13 hours enjoyed throughout the peak months of June, July, and August. After the vibrant energy of summer, the daylight duration starts to taper off, gradually descending to 11 hours in October and finally settling back to 10 hours by winter. September's sunshine still invites lingering beach days and sunset strolls, highlighting a perfect balance between warm summer days and the upcoming cooler months. It's a delightful time to savor the last moments of long daylight as nature gently shifts toward autumn.

Average Daylight Hours in South Padre Island for September

The chart illustrates the variation in daylight duration in South Padre Island throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 42m11h 16m12h 1m12h 47m13h 25m13h 43m13h 33m12h 59m12h 15m11h 30m10h 51m10h 31m
Data source: South Padre Island daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in South Padre Island

As summer fades into fall, September in South Padre Island brings a gentle breeze, with average wind speeds dropping to 5.4 m/s (12 mph), the year's lowest. This slight decrease follows a mild summer, where wind speeds hovered between 5.6 m/s and 5.9 m/s. With each passing month from January to September, a subtle trend emerges: the winds slowly taper off, creating a tranquil environment ideal for beachgoers and nature enthusiasts alike. As the island transitions into autumn, the soft winds offer a refreshing contrast to the bustling summer crowds, inviting visitors to enjoy the serene beauty of the coast.

Average September Wind Speed in South Padre Island

The chart displays monthly wind speed patterns in South Padre Island, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec6.16.96.46.66.96.05.65.75.4 m/s5.76.26.6
Data source: South Padre Island September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in South Padre Island Compares to Other Months

The weather in South Padre Island changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in South Padre Island and find detailed weather information for every month.

In September, South Padre Island experiences warm temperatures, typically ranging from a minimum of 24°C (75°F) to a maximum of 31°C (88°F), with an average of 28°C (82°F). The month is also characterized by significant rainfall, with 136 mm (5.3 in) of precipitation over about 17 days, and humidity levels are high at 77%. In contrast, January sees much cooler weather, with temperatures dropping to a minimum of 4°C (40°F) and a maximum of 26°C (79°F), averaging around 18°C (64°F). This month is considerably drier, with only 47 mm (1.9 in) of precipitation over 8 days, while humidity remains similar at 78%. For more details on January conditions, you can explore South Padre Island weather in January.

September and February present strikingly different weather patterns. In September, temperatures range from a minimum of 24°C (75°F) to a maximum of 31°C (88°F), with an average of 28°C (82°F). This month also sees significant rainfall, with 136 mm (5.3 in) spread over about 17 days, contributing to a humidity level of 77%. In contrast, February offers a much cooler climate, with temperatures dipping to a minimum of 0°C (33°F) and peaking at 26°C (79°F), averaging 18°C (65°F). Precipitation is considerably lower in February, at just 36 mm (1.4 in) over 8 days, and humidity rises slightly to 81%. For more detailed insights, you can check South Padre Island weather in February.

September and March contrast significantly in terms of weather conditions. September typically features warmer temperatures with a minimum of 24°C (75°F) and an average of 28°C (82°F), reaching a maximum of 31°C (88°F). It also brings higher precipitation, accumulating 136 mm (5.3 in) over 17 rainy days, coupled with a humidity level of 77%. In contrast, March presents a much cooler climate, with temperatures ranging from a minimum of 9°C (48°F) to an average of 20°C (69°F), peaking at 26°C (79°F). Additionally, March experiences significantly less rain, with only 42 mm (1.6 in) falling across 7 days, while humidity slightly increases to 81%. For more detailed information, you can check the South Padre Island weather in March.

Comparing the weather in September and April reveals distinct seasonal differences. September tends to be much warmer, with average temperatures ranging from a minimum of 24°C (75°F) to a maximum of 31°C (88°F). In contrast, April experiences cooler temperatures, with a minimum of 12°C (54°F) and an average of 23°C (74°F). Additionally, September is characterized by higher precipitation, receiving about 136 mm (5.3 in) over 17 days, while April sees significantly less rainfall at 26 mm (1.0 in) over just 5 days. Humidity levels are also notable, with September at 77% and April slightly higher at 85%. For more details, you can check out South Padre Island weather in April.

When comparing the weather in September and May, notable differences emerge. September typically features warmer temperatures with a minimum of 24°C (75°F), an average of 28°C (82°F), and a maximum of 31°C (88°F). In contrast, May sees slightly cooler conditions, with a minimum of 22°C (71°F), an average of 26°C (79°F), and a maximum of 29°C (84°F). Additionally, September experiences significantly more precipitation, with 136 mm (5.3 in) over 17 days, compared to May's 68 mm (2.7 in) across just 7 days. Humidity levels are also higher in September at 77%, while May has a humidity of 83%. For further details on May weather, you can check South Padre Island weather in May.

Both September and June exhibit similar temperature ranges, with average highs reaching 31°C (88°F) and lows around 23-24°C (74-75°F). However, September tends to be wetter, receiving 136 mm (5.3 in) of precipitation over 17 days compared to June's 87 mm (3.4 in) over 14 days. The humidity levels in September are slightly lower at 77% compared to June's 79%, creating a marginally different feel despite the comparable temperatures. For a more detailed look at June's climate, check out South Padre Island weather in June.

In comparing the weather patterns of September and July, we see that both months maintain similar temperature ranges, with September averaging 28°C (82°F) and July slightly cooler at 28°C (83°F). However, September experiences more rainfall, with 136 mm (5.3 in) over 17 days, compared to July's 125 mm (4.9 in) over just 8 days. Humidity levels are also slightly different, with September at 77% and July a bit higher at 79%. For a more detailed look at July's weather specifics, you can check South Padre Island weather in July.

In comparing the weather of September to August, we see that September tends to have slightly cooler temperatures, with a minimum of 24°C (75°F) compared to August's 25°C (77°F). Both months share the same maximum temperature of 31°C (88°F), but September's average is slightly lower at 28°C (82°F), while August's averages 29°C (84°F). Notably, September experiences significantly more precipitation, with 136 mm (5.3 in) over 17 days, compared to just 32 mm (1.2 in) over 8 days in August. Humidity levels remain consistent at 77% for both months, creating a similarly muggy atmosphere. For more specific details on August's weather, check out South Padre Island weather in August.

September weather is characterized by relatively high temperatures, with a minimum of 24°C (75°F) and an average reaching 28°C (82°F). The month is quite humid, with 77% humidity and a total precipitation of 136 mm (5.3 in) spread across 17 days. In contrast, October sees a notable drop in minimum temperatures to 13°C (57°F), though the average temperature remains warm at 26°C (79°F). Precipitation decreases to 94 mm (3.7 in) over 14 days, and humidity slightly lowers to 76%. For more detailed insights, you can check out South Padre Island weather in October.

In September, the weather is significantly warmer, with minimum temperatures averaging around 24°C (75°F) and maximums reaching 31°C (88°F). The month sees considerable rainfall, with precipitation totaling 136 mm (5.3 in) over 17 days, creating a humid environment with 77% humidity. In contrast, November brings a notable drop in temperatures, with minimums falling to 8°C (47°F) and an average of 22°C (72°F). Rainfall is also reduced in November, totaling 71 mm (2.8 in) over just 9 days, while humidity slightly increases to 79%. For more detailed information, you can check out South Padre Island weather in November.

In September, the weather is characterized by warm temperatures, with a minimum of 24°C (75°F) and an average of 28°C (82°F), peaking at a maximum of 31°C (88°F). This month also brings significant rainfall, averaging 136 mm (5.3 in) over 17 days, coupled with a high humidity of 77%. In contrast, December sees a notable drop in temperature, where the minimum dips to 6°C (44°F), with an average of 19°C (67°F) and a maximum of 25°C (78°F). Rainfall is considerably less in December, totaling only 43 mm (1.7 in) over just 7 days, and humidity remains relatively high at 79%. For more detailed information about this month, you can check South Padre Island weather in December.

Compare South Padre Island's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in South Padre Island

As summer transitions into fall, September in South Padre Island presents a unique blend of warmth and moisture, offering a mild climate that distinctly contrasts with the hotter months preceding it. With average temperatures settling comfortably around 28°C (82°F), visitors can expect pleasant days for beach activities, even as humidity remains elevated at 77%. However, September does bring a higher chance of rain, with around half the month experiencing some level of precipitation. This wet pattern makes it different from the more arid summer months while still providing ample sunshine and warm conditions. For more insights into the broader weather patterns, explore the South Padre Island Climate page.