Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Saint Thomas's December weather shows a modest shift in high-temperatures, falling from November's agreeable 69.1°F (20.6°C) to a refreshing 63°F (17.2°C). During December, the nighttime temperature averages to a chilly 48.7°F (9.3°C).Humidity
The months with the highest humidity are February, July through September and December, with an average relative humidity of 80%.Rainfall
In Saint Thomas, Louisiana, during December, the rain falls for 13 days and regularly aggregates up to 2.24" (57mm) of precipitation. In Saint Thomas, during the entire year, the rain falls for 170.8 days and collects up to 30.16" (766mm) 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 0.04" (1mm) of snow. Throughout the year, there are 0.2 snowfall days, and 0.2" (5mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 10h and 18min of daylight.On the first day of the month, sunrise is at 6:42 am and sunset at 5:04 pm. On the last day of December, sunrise is at 6:59 am and sunset at 5:15 pm CST.
Sunshine
The month with the least sunshine is December, with an average of 5.1h of sunshine.UV index
With an average maximum UV index of 3, December is the month with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high daily UV index of 3 during December translates into the following directions:
Take necessary precautions - Defending against sun damage is advocated. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average December temperature?
What are the most humid months?
What is the average humidity in December?
How many days does it rain in December in Saint Thomas?
When does it start to snow?
What is the month with the shortest days?
How many hours of daylight does Saint Thomas have in December?
When are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Saint Thomas have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Saint Thomas, LA
- Average high temperature in December: 63°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (60.1°F).
- Average low temperature in December: 48.7°F
The month with the highest average low temperature is August (74.8°F).
The coldest month (with the lowest average low temperature) is January (44.8°F).
Average pressure in December
Saint Thomas, LA
- Average pressure in December: 30.12"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
Saint Thomas, LA
- Average wind speed in December: 7.1mph
The windiest months (with the highest average wind speed) are February and April (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in December
Saint Thomas, LA
- Average humidity in December: 80%
The months with the highest relative humidity are February, July, August, September and December (80%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Saint Thomas, LA
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is July (4.76").
The driest month (with the least rainfall) is November (1.3").
Average rainfall days in December
Saint Thomas, LA
- Average rainfall days in December: 13 days
The month with the highest number of rainy days is July (22.3 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in December
Saint Thomas, LA
- Average snowfall in December: 0.04"
The month with the highest snowfall is January (0.16").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in December
Saint Thomas, LA
- Average snowfall days in December: 0.1 days
The months with the highest number of snowfall days are January and December (0.1 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
Saint Thomas, 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 30min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in December
Saint Thomas, LA
- Average sunshine days in December: 15.6 days
The month with the most sunshine days is November (20.2 days).
The months with the least sunshine days are July and August (6.4 days).
Average UV index in December
Saint Thomas, LA
- Average UV index in December: 3
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in December
Saint Thomas, LA
- Average cloud cover in December: 47
The month with the most cloud cover is December (Cloud cover 47).
The month with the least cloud cover is October (Cloud cover 26).
Average visibility in December
Saint Thomas, LA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).
Saint Thomas, Louisiana, USA
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