September weather forecast
Port Aransas, TX

The weather in Port Aransas in September shifts towards cooler fall-like conditions, although the highest temperature still remains at a warm 84.9°F. On the cusp of the transitioning season yet still enjoying summer remnants, beach outings and other outdoor activities remain prevalent among locals and tourists. Slightly cooler evenings compared to the peak summer provide appealing conditions for dining al fresco or mild night-time activities. Even though September notes the highest rainfall of 2.99" in the year, it does not profoundly impact the city's vivid lifestyle. Moreover, the sea temperature still encourages various water activities, adding to September's charm in Port Aransas, Texas.

Temperature

September's average high-temperature in Port Aransas stands at a warm 84.9°F, showing little deviation from August's 86.7°F. September nights register a minor temperature decline, steadying at 79.7°F.

Heat index

In September, the average heat index is computed to be a fiery hot 95°F. Additional precautions are required to avert heat cramps and heat exhaustion. Persistent activity may culminate in heatstroke.
It is emphasized that the heat index's values are meant for shaded zones with mild winds. Direct sunlight might cause an increase of up to 15 Fahrenheit (8 Celsius) degrees in the heat index.
Note: The heat index, also known as 'apparent temperature' or 'feels like', embodies the combination of air temperature and moisture content to illustrate perceived heat. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. You should know that direct sun exposure can heighten weather effects, potentially elevating the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. An upsurge in relative humidity affects normal body cooling mechanisms by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.

Humidity

In Port Aransas, Texas, the average relative humidity in September is 75%.

Rainfall

September is the month with the most rainfall in Port Aransas. Rain falls for 17.8 days and accumulates 2.99" of precipitation.

Snowfall

January, March through December are months without snowfall in Port Aransas, Texas.

Ocean temperature

In September, the average ocean temperature in Port Aransas, Texas, is 84.6°F.
Note: For any water activity, surface water temperatures from 77°F to 84.2°F are deemed perfect and extremely pleasing for enduring enjoyment.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of September in Port Aransas, sunrise is at 7:06 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:15 pm CDT.

Sunshine

In Port Aransas, the average sunshine in September is 8.6h.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: In September, the maximum UV index of 7 translates into these guidelines:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. Try to minimize direct Sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Also note that objects like parasols or canopies might not provide complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.