December weather forecast
Port Aransas, TX

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Weather in December

December brings the onset of winter in Port Aransas and the whole of Texas, dropping the average temperature further to 65.1°F (18.4°C). This period is all about holiday cheer, bright decorations, and festive events taking place across the city. While cooler compared to the torrid summer months, temperatures remain mild enough for residents and visitors to enjoy outdoor holiday markets and events comfortably. Longer nights imply a significant reduction in daylight hours, making evenings quite chilly. Despite winter stepping in, the freeze remains rare and snowfall stays nearly non-existent, defying the general conception about winter in most other parts of USA.

Temperature

Port Aransas's progression into December involves a gentle drop in the average high-temperature, from a pleasant 71.1°F (21.7°C) in November to an enjoyable 65.1°F (18.4°C). Nighttime, during December, brings an average low of 57.6°F (14.2°C), a modest reduction from the day's peak.

Humidity

The average relative humidity in December is 78%.

Rainfall

In Port Aransas, during December, the rain falls for 9.8 days and regularly aggregates up to 0.98" (25mm) of precipitation. In Port Aransas, during the entire year, the rain falls for 126.5 days and collects up to 14.57" (370mm) of precipitation.

Snowfall

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

Ocean temperature

In Port Aransas, in December, the average water temperature is 66.4°F (19.1°C).
Note: Most people find swimming in 66.4°F (19.1°C) to be not enjoyable. The control of one's breathing becomes more challenging as the water temperature drops below 69.8°F (21°C).

Daylight

December has the shortest days of the year, with an average of 10h and 24min of daylight.
On the first day of December, sunrise is at 7:02 am and sunset at 5:32 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:44 pm CST.

Sunshine

With an average of 4.8h of sunshine, December has the least sunshine of the year.

UV index

January and December, with an average maximum UV index of 4, are months with the lowest UV index in Port Aransas. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: In December, the maximum UV index of 4 suggests these recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Updated: Feb 14, 2024 | Published by: Weather U.S. | Resources

Frequently asked questions

What is the usual temperature for Port Aransas in December?

The high-temperature, in December, in Port Aransas, is 65.1°F (18.4°C), while the low-temperature averages to 57.6°F (14.2°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), which factors the actual air temperature with the relative humidity, is calculated to be 95°F (35°C).

What is the average humidity in December in Port Aransas?

The average relative humidity in December in Port Aransas, Texas, is 78%.

How much does it rain in Port Aransas in December?

In Port Aransas, Texas, in December, during 9.8 rainfall days, 0.98" (25mm) of precipitation is typically accumulated.

When it does not snow in Port Aransas?

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

What is the ocean temperature in December in Port Aransas?

In Port Aransas, Texas, the average seawater temperature in December is 66.4°F (19.1°C). Swimming in 66.4°F (19.1°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the month with the shortest days in Port Aransas?

December has the shortest days of the year, with an average of 10h and 24min of daylight.

How many hours of daylight does Port Aransas have in December?

In December, the average day length is 10h and 25min.

When are sunrise and sunset in December in Port Aransas?

On the first day of December in Port Aransas, sunrise is at 7:02 am and sunset at 5:32 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:44 pm CST.

What is the month with the least sunshine in Port Aransas?

December has the least sunshine of the year, with an average of 4.8h of sunshine.

How long on average sun shines in December in Port Aransas?

In December, the average sunshine duration in Port Aransas is 4.8h.

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

January and December, with an average maximum UV index of 4, are months with the lowest UV index in Port Aransas, Texas.

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

In Port Aransas, the average daily maximum UV index in December is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Port Aransas, TX

Average temperature in December - Port Aransas, TX
  • Average high temperature in December: 65.1°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 December: 57.6°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 December
Port Aransas, TX

Average pressure in December - Port Aransas, TX
  • Average pressure in December: 30.08"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 December
Port Aransas, TX

Average wind speed in December - Port Aransas, TX
  • Average wind speed in December: 12.5mph

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 December
Port Aransas, TX

Average humidity in December - Port Aransas, TX
  • Average humidity in December: 78%

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 December
Port Aransas, TX

Average rainfall in December - Port Aransas, TX
  • Average rainfall in December: 0.98"

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 December
Port Aransas, TX

Average rainfall days in December - Port Aransas, TX
  • Average rainfall days in December: 9.8 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 December
Port Aransas, TX

Average snowfall in December - Port Aransas, TX
  • Average snowfall in December: 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 December
Port Aransas, TX

Average snowfall days in December - Port Aransas, TX
  • Average snowfall days in December: 0 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 December
Port Aransas, TX

Average sea temperature in December - Port Aransas, TX
  • Average sea temperature in December: 66.4°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 December /
Average sunshine in December
Port Aransas, TX

Average daylight in December / Average sunshine in December - Port Aransas, TX
  • Average daylight in December: 10h and 2min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

  • Average sunshine in December: 4h and 5min

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 December
Port Aransas, TX

Average sunshine days in December - Port Aransas, TX
  • Average sunshine days in December: 17.8 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 December
Port Aransas, TX

Average UV index in December - Port Aransas, TX
  • Average UV index in December: 4

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 December
Port Aransas, TX

Average cloud cover in December - Port Aransas, TX
  • Average cloud cover in December: 47

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 December
Port Aransas, TX

Average visibility in December - Port Aransas, TX
  • Average visibility in December: 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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Port Aransas, Texas, USA

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