December weather forecast
Thibodaux, LA

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Weather in December

As the year draws to an end in Thibodaux, Louisiana, the winter chill starts making its presence known. December is characterized by moderate to low temperatures during the day accompanied by cooler nights. The shift in weather pattern pushes down the rainfall to 1.85" (47mm) compared to November. December is also defined by shorter days and reduced sunlight hours. As the cycle renews, January brings with it similar characteristics with slightly lower temperatures.

Temperature

Transition into December in Thibodaux subtly marks a drop in the average high-temperature, moderately moving from a pleasant 69.4°F (20.8°C) in November to a refreshing 63.7°F (17.6°C). Throughout the month of December, Thibodaux expects an average low of 50.2°F (10.1°C).

Humidity

July through September and December, with an average relative humidity of 79%, are the most humid months.

Rainfall

In Thibodaux, in December, during 11.8 rainfall days, 1.85" (47mm) of precipitation is typically accumulated. Throughout the year, there are 166.9 rainfall days, and 25.39" (645mm) of precipitation is accumulated.

Snowfall

January and December are months with snowfall. December is the first month it typically snows. Throughout December, there are 0.1 snowfall days. Throughout the year, there are 0.4 snowfall days.

Daylight

The month with the shortest days is December, with an average of 10h and 18min of daylight.
On the first day of the month, sunrise is at 6:41 am and sunset at 5:03 pm. On the last day of December, sunrise is at 6:58 am and sunset at 5:14 pm CST.

Sunshine

The month with the least sunshine is December, with an average of 5.2h of sunshine.

UV index

January, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: A maximum UV index of 4 in December translates into the following recommendations:
Act with care - The need to guard against sun damage is communicated. When the Sun is at its strongest around midday, find shade and limit exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Updated: Aug 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in December?

Thibodaux in December has an average high-temperature of 63.7°F (17.6°C) and an average low-temperature of 50.2°F (10.1°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), which represents the influence of relative humidity on air temperature, is evaluated at 102.2°F (39°C).

What is the most humid month in Thibodaux?

July through September and December, with an average relative humidity of 79%, are most humid months.

What is the average humidity in December?

The average relative humidity in December is 79%.

How many days does it rain in December?

In Thibodaux, during December, the rain falls for 11.8 days and regularly aggregates up to 1.85" (47mm) of precipitation.

When does it start snowing?

December is the first month it typically snows. Throughout December, there are 0.1 snowfall days.

What is the month with the shortest days?

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

How many hours of daylight does Thibodaux have in December?

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

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 6:41 am and sunset at 5:03 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 5:14 pm CST.

What is the month with the least sunshine?

The month with the least sunshine is December, with an average of 5.2h of sunshine.

How long on average sun shines in December?

The average sunshine duration in December is 5.2h.

What are the months with the lowest UV index?

January, November and December, with an average maximum UV index of 4, are months with the lowest UV index.

What is the UV index reading in December?

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

Average temperature in December
Thibodaux, LA

Average temperature in December - Thibodaux, LA
  • Average high temperature in December: 63.7°F

The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (60.8°F).

  • Average low temperature in December: 50.2°F

The months with the highest average low temperature are July and August (75.7°F).
The coldest month (with the lowest average low temperature) is January (46.2°F).

Average pressure in December
Thibodaux, LA

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

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

Average wind speed in December
Thibodaux, LA

Average wind speed in December - Thibodaux, LA
  • Average wind speed in December: 7.8mph

The windiest months (with the highest average wind speed) are February and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average humidity in December
Thibodaux, LA

Average humidity in December - Thibodaux, LA
  • Average humidity in December: 79%

The months with the highest relative humidity are July, August, September and December (79%).
The month with the lowest relative humidity is October (74%).

Average rainfall in December
Thibodaux, LA

Average rainfall in December - Thibodaux, LA
  • Average rainfall in December: 1.85"

The wettest month (with the highest rainfall) is July (4.61").
The driest month (with the least rainfall) is November (1.14").

Average rainfall days in December
Thibodaux, LA

Average rainfall days in December - Thibodaux, LA
  • Average rainfall days in December: 11.8 days

The month with the highest number of rainy days is August (22.3 days).
The month with the least rainy days is November (7.2 days).

Average snowfall days in December
Thibodaux, LA

Average snowfall days in December - Thibodaux, LA
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).

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

Average daylight in December / Average sunshine in December - Thibodaux, 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: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).

Average sunshine days in December
Thibodaux, LA

Average sunshine days in December - Thibodaux, LA
  • Average sunshine days in December: 17 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is August (5.8 days).

Average UV index in December
Thibodaux, LA

Average UV index in December - Thibodaux, LA
  • 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, November and December (UV index 4).

Average cloud cover in December
Thibodaux, LA

Average cloud cover in December - Thibodaux, 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
Thibodaux, LA

Average visibility in December - Thibodaux, 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).

Thibodaux, Louisiana, USA

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