December weather forecast
Southport, LA

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Weather in December

December, the first month of the winter in Southport, is still a refreshing month, with an average temperature fluctuating between 63.3°F (17.4°C) and 52°F (11.1°C).

Temperature

Southport experiences a moderate temperature shift at the start of December, with average high-temperatures adjusting a bit from a pleasant 68.9°F (20.5°C) in November to a refreshing 63.3°F (17.4°C). During the month of December, the nighttime temperature in Southport falls to an average of 52°F (11.1°C).

Humidity

The most humid month is December, with an average relative humidity of 78%.

Rainfall

In Southport, Louisiana, in December, it is raining for 7.2 days, with typically 0.71" (18mm) of accumulated precipitation. Throughout the year, there are 104.1 rainfall days, and 8.39" (213mm) of precipitation is accumulated.

Daylight

With an average of 10h and 18min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:39 am and sunset at 5:00 pm. On the last day of December, sunrise is at 6:56 am and sunset at 5:11 pm CST.

Sunshine

With an average of 5.1h of sunshine, December has the least sunshine of the year.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 3 in December interprets into the following advice:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in December?

December temperatures vary between a high-temperature of 63.3°F (17.4°C) and a low-temperature of 52°F (11.1°C). In September, the average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, is evaluated at 98.6°F (37°C).

What is the most humid month?

December is the most humid month, with an average relative humidity of 78%.

What is the average humidity in December?

In Southport, the average relative humidity in December is 78%.

How many days does it rain in December?

In Southport, during December, the rain falls for 7.2 days and regularly aggregates up to 0.71" (18mm) of precipitation.

What is the month with the shortest days?

December has the shortest days of the year in Southport, with an average of 10h and 18min of daylight.

What is the average length of the day in December?

In December, the average day length in Southport is 10h and 16min.

What time are sunrise and sunset in December in Southport?

In December, on the first day of the month, sunrise is at 6:39 am and sunset at 5:00 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 5:11 pm CST.

What is the month with the least sunshine?

With an average of 5.1h of sunshine, December has the least sunshine of the year.

How long on average sun shines in December?

The average sunshine duration in December is 5.1h.

When is the lowest UV index in Southport?

December is the month with the lowest UV index, with an average maximum UV index of 3.

What is the UV index intensity in December?

The average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Southport, LA

Average temperature in December - Southport, LA
  • Average high temperature in December: 63.3°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (60.4°F).

  • Average low temperature in December: 52°F

The month with the highest average low temperature is August (79°F).
The coldest month (with the lowest average low temperature) is January (47.8°F).

Average pressure in December
Southport, LA

Average pressure in December - Southport, LA
  • Average pressure in December: 30.12"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).

Average wind speed in December
Southport, LA

Average wind speed in December - Southport, LA
  • Average wind speed in December: 9.3mph

The windiest months (with the highest average wind speed) are February and April (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

Average humidity in December
Southport, LA

Average humidity in December - Southport, LA
  • Average humidity in December: 78%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is October (71%).

Average rainfall in December
Southport, LA

Average rainfall in December - Southport, LA
  • Average rainfall in December: 0.71"

The wettest month (with the highest rainfall) is July (1.3").
The driest month (with the least rainfall) is March (0.39").

Average rainfall days in December
Southport, LA

Average rainfall days in December - Southport, LA
  • Average rainfall days in December: 7.2 days

The month with the highest number of rainy days is August (14.8 days).
The month with the least rainy days is November (4.5 days).

Average daylight in December /
Average sunshine in December
Southport, LA

Average daylight in December / Average sunshine in December - Southport, LA
  • Average daylight in December: 10h and 2min

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in December: 5h and 1min

The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

Average sunshine days in December
Southport, LA

Average sunshine days in December - Southport, LA
  • Average sunshine days in December: 21.8 days

The month with the most sunshine days is November (24.6 days).
The month with the least sunshine days is August (10.3 days).

Average UV index in December
Southport, LA

Average UV index in December - Southport, LA
  • Average UV index in December: 3

The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 3).

Average cloud cover in December
Southport, LA

Average cloud cover in December - Southport, LA
  • Average cloud cover in December: 45

The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is October (Cloud cover 24).

Average visibility in December
Southport, LA

Average visibility in December - Southport, LA
  • 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).

Southport, Louisiana, USA

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