December weather forecast
Baton Rouge, LA

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Manicured lawns and beautiful trees approaching the State Capitol building in Baton Rouge, Louisiana
Manicured lawns and beautiful trees approaching the State Capitol building in Baton Rouge, Louisiana

Weather in December

December in Baton Rouge ushers in the cold festive season. The temperature in December sees a further slump from November, ushering in a chilled and calm atmosphere. While rainfall increases towards the end of the year, the incidence of snow makes a minuscule reappearance. As winter officially sets in, Baton Rouge experiences increased cloud cover compared to November. The city also witnesses the lowest daily hours of sunshine for the year, averaging at 5 hours per day, giving the city a calmer and more peaceful atmosphere.

Temperature

December in Baton Rouge heralds a minor drop in average high-temperature, sliding from November's pleasant 68.4°F (20.2°C) to a comfortable 61.5°F (16.4°C). During December, the nighttime temperature in Baton Rouge averages of 46.4°F (8°C).

Humidity

In Baton Rouge, the average relative humidity in December is 81%.

Rainfall

In Baton Rouge, during December, the rain falls for 13.4 days and regularly aggregates up to 3.35" (85mm) of precipitation. Throughout the year, in Baton Rouge, there are 177.1 rainfall days, and 36.1" (917mm) of precipitation is accumulated.

Snowfall

January and December are months with snowfall. December is the first month it typically snows. Throughout December, in the average 0.1 snowfall days, it receives 0.24" (6mm) of snow. Throughout the year, there are 0.5 snowfall days, and 0.51" (13mm) of snow is accumulated.

Daylight

With an average of 10h and 12min of daylight, December has the shortest days of the year.
On the first day of the month, sunrise is at 6:44 am and sunset at 5:03 pm. On the last day of December, in Baton Rouge, sunrise is at 7:01 am and sunset at 5:14 pm CST.

Sunshine

The month with the least sunshine in Baton Rouge, Louisiana, is December, with an average of 5h of sunshine.

UV index

January and December, with an average maximum UV index of 3, are months with the lowest UV index in Baton Rouge. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: The maximum daily UV index, 3 in December, converts into the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
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Frequently asked questions

What are December temperatures in Baton Rouge?

December temperatures in Baton Rouge, Louisiana, vary between a high-temperature of 61.5°F (16.4°C) and a low-temperature of 46.4°F (8°C). In September, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is computed to be 105.8°F (41°C).

What is the average humidity in December in Baton Rouge?

In Baton Rouge, Louisiana, the average relative humidity in December is 81%.

How many days does it rain in December in Baton Rouge?

In Baton Rouge, during December, the rain falls for 13.4 days and regularly aggregates up to 3.35" (85mm) of precipitation.

When does it start snowing in Baton Rouge?

December is the first month it typically snows. Throughout December, in the average 0.1 snowfall days, it receives 0.24" (6mm) of snow.

What is the month with the shortest days in Baton Rouge?

The month with the shortest days in Baton Rouge is December, with an average of 10h and 12min of daylight.

What is the average length of the day in December in Baton Rouge?

The average day length in December in Baton Rouge, Louisiana, is 10h and 13min.

When are sunrise and sunset in December in Baton Rouge?

In December, on the first day of the month, sunrise is at 6:44 am and sunset at 5:03 pm. On the last day of the month, in Baton Rouge, sunrise is at 7:01 am and sunset at 5:14 pm CST.

What is the month with the least sunshine in Baton Rouge?

December has the least sunshine of the year, with an average of 5h of sunshine.

How many hours of sunshine does Baton Rouge have in December?

The average sunshine duration in December is 5h.

What are the months with the lowest UV index in Baton Rouge?

January and December, with an average maximum UV index of 3, are months with the lowest UV index in Baton Rouge.

How high is the UV index in December in Baton Rouge?

In Baton Rouge, Louisiana, the average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to 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
Baton Rouge, LA

Average temperature in December - Baton Rouge, LA
  • Average high temperature in December: 61.5°F

The warmest months (with the highest average high temperature) are July and August (91.9°F).
The month with the lowest average high temperature is January (58.6°F).

  • Average low temperature in December: 46.4°F

The month with the highest average low temperature is August (73.9°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).

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Average pressure in December
Baton Rouge, LA

Average pressure in December - Baton Rouge, LA
  • Average pressure in December: 30.13"Hg

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

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Average wind speed in December
Baton Rouge, LA

Average wind speed in December - Baton Rouge, LA
  • Average wind speed in December: 6.3mph

The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.4mph).

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Average humidity in December
Baton Rouge, LA

Average humidity in December - Baton Rouge, LA
  • Average humidity in December: 81%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is October (72%).

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Average rainfall in December
Baton Rouge, LA

Average rainfall in December - Baton Rouge, LA
  • Average rainfall in December: 3.35"

The wettest month (with the highest rainfall) is July (4.72").
The driest month (with the least rainfall) is November (1.77").

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Average rainfall days in December
Baton Rouge, LA

Average rainfall days in December - Baton Rouge, LA
  • Average rainfall days in December: 13.4 days

The month with the highest number of rainy days is July (22.5 days).
The month with the least rainy days is November (8.8 days).

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Average snowfall in December
Baton Rouge, LA

Average snowfall in December - Baton Rouge, LA
  • Average snowfall in December: 0.24"

The month with the highest snowfall is January (0.28").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in December
Baton Rouge, LA

Average snowfall days in December - Baton Rouge, 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 March, April, May, June, July, August, September, October and November (0 days).

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Average daylight in December /
Average sunshine in December
Baton Rouge, LA

Average daylight in December / Average sunshine in December - Baton Rouge, LA
  • Average daylight in December: 10h and 1min

The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).

  • Average sunshine in December: 5h and 0min

The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

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Average sunshine days in December
Baton Rouge, LA

Average sunshine days in December - Baton Rouge, LA
  • Average sunshine days in December: 16.3 days

The month with the most sunshine days is November (19.6 days).
The months with the least sunshine days are July and August (7.3 days).

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Average UV index in December
Baton Rouge, LA

Average UV index in December - Baton Rouge, LA
  • Average UV index in December: 3

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

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Average cloud cover in December
Baton Rouge, LA

Average cloud cover in December - Baton Rouge, LA
  • Average cloud cover in December: 50

The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 29).

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Average visibility in December
Baton Rouge, LA

Average visibility in December - Baton Rouge, LA
  • Average visibility in December: 5mi

The months with the highest visibility are October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September and December (5mi).

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Baton Rouge, Louisiana, USA

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