September weather forecast
Port Aransas, TX

Weather in September

The first month of the autumn, September, is also a moderately hot month in Port Aransas, Texas, with an average temperature varying between 84.9°F (29.4°C) and 79.7°F (26.5°C).

Temperature

In September, the average high-temperature is practically the same as in August - a warm 84.9°F (29.4°C). The average low-temperature, in September, is 79.7°F (26.5°C).

Heat index

The average heat index in September is appraised at a hot 94.5°F (34.7°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, metabolic differences, pregnancy). Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

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

Rainfall

The month with the most rainfall in Port Aransas is September, when the rain falls for 17.8 days and typically aggregates up to 2.99" (76mm) of precipitation.

Snowfall

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

Ocean temperature

In September, the average ocean temperature in Port Aransas is 84.6°F (29.2°C).
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in September in Port Aransas, Texas, is 12h and 19min.
On the first day of the month, sunrise is at 7:07 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:20 am and sunset at 7:15 pm CDT.

Sunshine

In September, the average sunshine 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 reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 7 in September interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in September in Port Aransas?

In Port Aransas, in September, the average high-temperature is 84.9°F (29.4°C), and the average low-temperature is 79.7°F (26.5°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is appraised at 94.5°F (34.7°C).

What is the average humidity in September in Port Aransas?

In September, the average relative humidity is 75%.

What is the wettest month in Port Aransas?

The month with the most rainfall is September, when the rain falls for 17.8 days and typically aggregates up to 2.99" (76mm) of precipitation.

How many days does it rain in September in Port Aransas?

In September, the rain falls for 17.8 days. Throughout September, 2.99" (76mm) of precipitation is accumulated.

When it does not snow in Port Aransas?

In Port Aransas, Texas, snow does not fall in January, March through December.

How warm is the water in September in Port Aransas?

In Port Aransas, in September, the average water temperature is 84.6°F (29.2°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Port Aransas?

In September, the average day length is 12h and 19min.

When is the sunrise / sunset in September in Port Aransas?

On the first day of September, sunrise is at 7:07 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.

How many hours of sunshine does Port Aransas have in September?

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

What are the months with the highest UV index in Port Aransas?

The months with the highest UV index are May through September, with an average maximum UV index of 7.

How high is the UV index in September in Port Aransas?

In Port Aransas, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Port Aransas, TX

Average temperature in September - Port Aransas, TX
  • Average high temperature in September: 84.9°F

The warmest month (with the highest average high temperature) is August (86.7°F).
The month with the lowest average high temperature is January (62.6°F).

  • Average low temperature in September: 79.7°F

The month with the highest average low temperature is August (82°F).
The coldest month (with the lowest average low temperature) is January (54.9°F).

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Average pressure in September
Port Aransas, TX

Average pressure in September - Port Aransas, TX
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in September
Port Aransas, TX

Average wind speed in September - Port Aransas, TX
  • Average wind speed in September: 11.3mph

The windiest months (with the highest average wind speed) are April and May (14.2mph).
The calmest month (with the lowest average wind speed) is September (11.3mph).

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Average humidity in September
Port Aransas, TX

Average humidity in September - Port Aransas, TX
  • Average humidity in September: 75%

The months with the highest relative humidity are March and May (81%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in September
Port Aransas, TX

Average rainfall in September - Port Aransas, TX
  • Average rainfall in September: 2.99"

The wettest month (with the highest rainfall) is September (2.99").
The driest months (with the least rainfall) are February and March (0.51").

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Average rainfall days in September
Port Aransas, TX

Average rainfall days in September - Port Aransas, TX
  • Average rainfall days in September: 17.8 days

The month with the highest number of rainy days is September (17.8 days).
The month with the least rainy days is February (7.8 days).

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Average snowfall in September
Port Aransas, TX

Average snowfall in September - Port Aransas, TX
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in September
Port Aransas, TX

Average snowfall days in September - Port Aransas, TX
  • Average snowfall days in September: 0.1 days

The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are January, March, April, May, June, July, August, October, November and December (0 days).

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Average sea temperature in September
Port Aransas, TX

Average sea temperature in September - Port Aransas, TX
  • Average sea temperature in September: 84.6°F

The best month for swimming (with the highest average sea temperature) is August (86.1°F).
The coldest month (with the lowest average sea temperature) is February (61.3°F).

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Average daylight in September /
Average sunshine in September
Port Aransas, TX

Average daylight in September / Average sunshine in September - Port Aransas, TX
  • Average daylight in September: 12h and 19min

The month with the longest days is June (Average daylight: 13h and 53min).
The month with the shortest days is December (Average daylight: 10h and 25min).

  • Average sunshine in September: 8h and 36min

The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).

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Average sunshine days in September
Port Aransas, TX

Average sunshine days in September - Port Aransas, TX
  • Average sunshine days in September: 10.3 days

The month with the most sunshine days is March (20.5 days).
The month with the least sunshine days is September (10.3 days).

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Average UV index in September
Port Aransas, TX

Average UV index in September - Port Aransas, TX
  • Average UV index in September: 7

The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).

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Average cloud cover in September
Port Aransas, TX

Average cloud cover in September - Port Aransas, TX
  • Average cloud cover in September: 31

The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 22).

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Average visibility in September
Port Aransas, TX

Average visibility in September - Port Aransas, TX
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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