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 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
The start of December comes with a small reduction in the average high-temperature, subtly receding from an agreeable 68.2°F (20.1°C) in November to an enjoyable 61.7°F (16.5°C). Throughout December, Cecilia registers a consistent average low-temperature of 47.5°F (8.6°C).Humidity
In December, the average relative humidity is 81%.Rainfall
In Cecilia, in December, it is raining for 9.9 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, there are 135.8 rainfall days, and 16.1" (409mm) of precipitation is accumulated.Snowfall
January and December are months with snowfall. The months with the most snowfall days are January and December, with an average of 0.1 snowfall days.Daylight
With an average of 10h and 12min of daylight, December has the shortest days of the year in Cecilia.On the first day of the month, sunrise is at 6:46 am and sunset at 5:06 pm. On the last day of December, sunrise is at 7:03 am and sunset at 5:17 pm CST.
Sunshine
December has the least sunshine of the year, with an average of 5.1h of sunshine.UV index
The month with the lowest UV index is December, with an average maximum UV index of 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: The UV index of 3 during December leads to these advisories:
Act with care - The need to guard against sun damage is communicated. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in December?
What is the average humidity in December?
How much does it rain in December?
What is the snowiest month?
When does it start snowing?
What is the month with the shortest days?
How many hours of daylight does Cecilia have in December?
What time are sunrise and sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Cecilia have in December?
When is the lowest UV index?
How high is the UV index in December?
Average temperature in December
Cecilia, LA
- Average high temperature in December: 61.7°F
The warmest months (with the highest average high temperature) are July and August (90.1°F).
The month with the lowest average high temperature is January (58.6°F).
- Average low temperature in December: 47.5°F
The month with the highest average low temperature is August (74.3°F).
The coldest month (with the lowest average low temperature) is January (43.7°F).
Average pressure in December
Cecilia, LA
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in December
Cecilia, LA
- Average wind speed in December: 7.3mph
The windiest month (with the highest average wind speed) is February (7.7mph).
The calmest month (with the lowest average wind speed) is July (4.9mph).
Average humidity in December
Cecilia, 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 (73%).
Average rainfall in December
Cecilia, LA
- Average rainfall in December: 1.14"
The wettest month (with the highest rainfall) is August (2.44").
The driest months (with the least rainfall) are March and November (0.87").
Average rainfall days in December
Cecilia, LA
- Average rainfall days in December: 9.9 days
The month with the highest number of rainy days is August (17.7 days).
The month with the least rainy days is November (8.1 days).
Average snowfall days in December
Cecilia, 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
Cecilia, 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 1min
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 6min).
Average sunshine days in December
Cecilia, LA
- Average sunshine days in December: 18.6 days
The month with the most sunshine days is November (21.3 days).
The month with the least sunshine days is August (9.8 days).
Average UV index in December
Cecilia, 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
Cecilia, LA
- Average cloud cover in December: 47
The months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is October (Cloud cover 26).
Average visibility in December
Cecilia, LA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, May, June, October, November and December (6mi).
The months with the lowest visibility are April, July, August and September (5mi).
Cecilia, Louisiana, USA
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