December weather forecastPort Sulphur, LA
December
Weather in December
The first month of the winter, December, is still a refreshing month in Port Sulphur, Louisiana, with temperature in the range of an average low of 56.1°F (13.4°C) and an average high of 64.2°F (17.9°C).Temperature
Port Sulphur's December showcases an average high-temperature of a refreshing 64.2°F (17.9°C), hardly distinct from November's 69.3°F (20.7°C). Nighttime temperature sees a small decrement from daytime highs, dipping to an average of 56.1°F (13.4°C) during December.Humidity
December is the most humid month in Port Sulphur, with an average relative humidity of 78%.Rainfall
In Port Sulphur, in December, it is raining for 9.8 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, there are 137.2 rainfall days, and 19.92" (506mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
The month with the shortest days in Port Sulphur, Louisiana, is December, with an average of 10h and 18min of daylight.On the first day of the month, sunrise is at 6:36 am and sunset at 4:59 pm. On the last day of December, sunrise is at 6:53 am and sunset at 5:10 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 5.3h of sunshine.UV index
January and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: A maximum daily UV index of 4 during December morphs into the following directions:
Ensure safety - Imperative it is to shield skin and eyes from damage. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Port Sulphur, LA
- Average high temperature in December: 64.2°F
The warmest month (with the highest average high temperature) is August (87.6°F).
The month with the lowest average high temperature is January (61.2°F).
- Average low temperature in December: 56.1°F
The month with the highest average low temperature is August (80.4°F).
The coldest month (with the lowest average low temperature) is January (51.6°F).
Average pressure in December
Port Sulphur, LA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).
Average wind speed in December
Port Sulphur, LA
- Average wind speed in December: 11.2mph
The windiest month (with the highest average wind speed) is January (11.3mph).
The calmest month (with the lowest average wind speed) is July (7.3mph).
Average humidity in December
Port Sulphur, 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 (70%).
Average rainfall in December
Port Sulphur, LA
- Average rainfall in December: 1.5"
The wettest month (with the highest rainfall) is August (4.72").
The driest month (with the least rainfall) is April (0.79").
Average rainfall days in December
Port Sulphur, LA
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is August (20.3 days).
The month with the least rainy days is November (7 days).
Average snowfall days in December
Port 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
Port Sulphur, LA
- Average daylight in December: 10h and 18min
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 18min
The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in December
Port Sulphur, LA
- Average sunshine days in December: 18.2 days
The months with the most sunshine days are April and November (20.9 days).
The month with the least sunshine days is August (7.3 days).
Average UV index in December
Port Sulphur, 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 and December (UV index 4).
Average cloud cover in December
Port Sulphur, LA
- Average cloud cover in December: 43
The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is May (Cloud cover 23).
Average visibility in December
Port 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).
