December weather forecast
Sulphur, LA

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Weather in December

In December, winter makes its presence known in Sulphur, Louisiana, as temperatures dip down to 61.7°F (16.5°C). With the shortest daylight hours of the year, the surroundings take on a decidedly wintery appeal. The cooling temperatures and increased chance of rainfall creates a holiday-like atmosphere around the city. The increasingly cooler temperatures drive people indoors, encouraging cozy gatherings around fireplaces. Despite the cold, the absence of snowfall makes the overall climate friendly and enticing.

Temperature

The arrival of December is marked by a minor reduction in average high-temperature, sliding from a pleasant 68.9°F (20.5°C) in November to a comfortable 61.7°F (16.5°C). Sulphur reports an average low-temperature of 47.5°F (8.6°C) during the nights of December.

Humidity

In Sulphur, the average relative humidity in December is 80%.

Rainfall

In December, the rain falls for 13.1 days. Throughout December, 2.48" (63mm) of precipitation is accumulated. Throughout the year, there are 160.8 rainfall days, and 28.54" (725mm) of precipitation is accumulated.

Snowfall

In Sulphur, snow does not fall in February through December.

Daylight

December has the shortest days of the year, with an average of 10h and 12min of daylight.
On the first day of the month, sunrise is at 6:52 am and sunset at 5:12 pm. On the last day of December, sunrise is at 7:09 am and sunset at 5:23 pm CST.

Sunshine

The month with the least sunshine is December, with an average of 5h of sunshine.

UV index

The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The daily high UV index of 3 in December translates into this advice:
Ensure safety - Sun damage prevention is strongly urged. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Updated: Jun 4, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average December temperature in Sulphur?

In Sulphur, 61.7°F (16.5°C) is the average high-temperature and 47.5°F (8.6°C) is the average low-temperature during December. In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, is calculated to be 104°F (40°C).

What is the average humidity in December?

In December, the average relative humidity is 80%.

How many days does it rain in December?

In Sulphur, during December, the rain falls for 13.1 days and regularly aggregates up to 2.48" (63mm) of precipitation.

When it does not snow?

February through December are months without snowfall.

Does it snow in December?

In Sulphur, in December, it doesn't snow. In January, it regularly snows.

What is the month with the shortest days?

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

What is the average length of the day in December?

The average day length in December is 10h and 14min.

When are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 6:52 am and sunset at 5:12 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 5:23 pm CST.

What is the month with the least sunshine?

With an average of 5h 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 5h.

What is the month with the lowest UV index?

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

How high is the UV index in December in Sulphur?

The average daily maximum UV index in December is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
68.9°F 20.5°C
61.7°F 16.5°C
59.2°F 15.1°C
Average low temperature
52.7°F 11.5°C
47.5°F 8.6°C
44.2°F 6.8°C
Average pressure
30.11" 765mmHg
30.11" 765mmHg
30.16" 766mmHg
Average wind speed
7.8mph 12.6km/h
8mph 12.9km/h
8mph 12.9km/h
Average max. wind speed
8.3mph 13.4km/h
8.6mph 13.8km/h
8.5mph 13.7km/h
Average wind speed gusts
12.7mph 20.4km/h
13mph 20.9km/h
12.9mph 20.8km/h
Average humidity
75%
80%
78%
Average rainfall
1.97" 50mm
2.48" 63mm
2.36" 60mm
Average rainfall days
9.9
13.1
10.6
Average snowfall
0" 0mm
0" 0mm
0.12" 3mm
Average snowfall days
0
0
0.2
Average daylight
10h 4min
10h 1min
10h 3min
Average sunshine
5h 5min
5h 0min
5h 2min
Average sunshine days
17.9
16.5
18.3
Average UV index
4
3
4
Average cloud cover
36%
46%
40%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in December
Sulphur, LA

Average temperature in December - Sulphur, LA
  • Average high temperature in December: 61.7°F

The warmest month (with the highest average high temperature) is August (91.9°F).
The month with the lowest average high temperature is January (59.2°F).

  • Average low temperature in December: 47.5°F

The month with the highest average low temperature is July (75.7°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).

Average pressure in December
Sulphur, LA

Average pressure in December - Sulphur, LA
  • Average pressure in December: 30.11"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in December
Sulphur, LA

Average wind speed in December - Sulphur, LA
  • Average wind speed in December: 8mph

The windiest month (with the highest average wind speed) is April (8.9mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

Average humidity in December
Sulphur, LA

Average humidity in December - Sulphur, LA
  • Average humidity in December: 80%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (72%).

Average rainfall in December
Sulphur, LA

Average rainfall in December - Sulphur, LA
  • Average rainfall in December: 2.48"

The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is February (1.54").

Average rainfall days in December
Sulphur, LA

Average rainfall days in December - Sulphur, LA
  • Average rainfall days in December: 13.1 days

The month with the highest number of rainy days is August (17.7 days).
The month with the least rainy days is November (9.9 days).

Average snowfall in December
Sulphur, LA

Average snowfall in December - Sulphur, LA
  • Average snowfall in December: 0"

The month with the highest snowfall is January (0.12").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

Average snowfall days in December
Sulphur, LA

Average snowfall days in December - Sulphur, LA
  • Average snowfall days in December: 0 days

The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in December / Average sunshine in December - Sulphur, 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 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

Average sunshine days in December
Sulphur, LA

Average sunshine days in December - Sulphur, LA
  • Average sunshine days in December: 16.5 days

The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is August (10.6 days).

Average UV index in December
Sulphur, LA

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

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

Average cloud cover in December
Sulphur, LA

Average cloud cover in December - Sulphur, LA
  • Average cloud cover in December: 46

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 26).

Average visibility in December
Sulphur, LA

Average visibility in December - Sulphur, 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).

Sulphur, Louisiana, USA

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