December weather forecast
Port Allen, LA

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Weather in December

December, the first month of the winter in Port Allen, is still a comfortable month, with temperature in the range of an average high of 61.5°F (16.4°C) and an average low of 46.4°F (8°C).

Temperature

December signifies a gentle decline in Port Allen's average high-temperature, easing from an agreeable 68.4°F (20.2°C) in November to a refreshing 61.5°F (16.4°C). In the month of December, Port Allen witnesses a consistent average low-temperature of 46.4°F (8°C).

Humidity

In December, the average relative humidity is 81%.

Rainfall

In Port Allen, in December, during 13.4 rainfall days, 3.35" (85mm) of precipitation is typically accumulated. In Port Allen, during the entire year, the rain falls for 177.1 days and collects up to 36.1" (917mm) of precipitation.

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

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

Sunshine

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

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the maximum UV index of 3 suggests this advice:
Take precautions - Protection against skin and eye damage is obliged. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.

Frequently asked questions

What are the temperatures in December?

December temperatures vary between a high-temperature of 61.5°F (16.4°C) and a low-temperature of 46.4°F (8°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 105.8°F (41°C).

What is the average humidity in December in Port Allen?

In Port Allen, the average relative humidity in December is 81%.

How many days does it rain in December?

In Port Allen, in December, during 13.4 rainfall days, 3.35" (85mm) of precipitation is typically accumulated.

When does it start snowing?

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?

With an average of 10h and 12min of daylight, December has the shortest days of the year.

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

In December, the average day length is 10h and 13min.

When are sunrise and sunset in December?

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, sunrise is at 7:01 am and sunset at 5:14 pm CST.

What is the month with the least sunshine?

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

How long on average sun shines in December?

In Port Allen, the average sunshine duration in December is 5h.

What are the months with the lowest UV index?

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

What is the UV index intensity in December?

In December, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health threat 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
Port Allen, LA

Average temperature in December - Port Allen, 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).

Average pressure in December
Port Allen, LA

Average pressure in December - Port Allen, 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).

Average wind speed in December
Port Allen, LA

Average wind speed in December - Port Allen, 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).

Average humidity in December
Port Allen, LA

Average humidity in December - Port Allen, 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%).

Average rainfall in December
Port Allen, LA

Average rainfall in December - Port Allen, 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").

Average rainfall days in December
Port Allen, LA

Average rainfall days in December - Port Allen, 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).

Average snowfall in December
Port Allen, LA

Average snowfall in December - Port Allen, 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").

Average snowfall days in December
Port Allen, LA

Average snowfall days in December - Port Allen, 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).

Average daylight in December /
Average sunshine in December
Port Allen, LA

Average daylight in December / Average sunshine in December - Port Allen, 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).

Average sunshine days in December
Port Allen, LA

Average sunshine days in December - Port Allen, 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).

Average UV index in December
Port Allen, LA

Average UV index in December - Port Allen, 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).

Average cloud cover in December
Port Allen, LA

Average cloud cover in December - Port Allen, 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).

Average visibility in December
Port Allen, LA

Average visibility in December - Port Allen, 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).

Port Allen, Louisiana, USA

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