December weather forecastSlidell, LA
December
Weather in December
December concludes the year in Slidell, Louisiana, with a cold snap. The average high temperature cools down to 62.1°F (16.7°C), indicating the arrival of winter. It is noteworthy that Slidell experiences 6 miles of visibility consistently throughout the year, indicating a relatively clear environment. December witnesses the highest relative humidity of 79%, combined with the lowest average sunlight of 10.2 hours per day. The weather in this month is characterized by cooler temperatures, overcast skies, and higher humidity, providing a classic winter scenario.Temperature
The move into December indicates a slight reduction in the average high-temperature, down from November's agreeable 68.4°F (20.2°C) to an enjoyable 62.1°F (16.7°C). In December, the nighttime temperature in Slidell lowers to an average of 49.5°F (9.7°C).Humidity
The most humid month is December, with an average relative humidity of 79%.Rainfall
In Slidell, during December, the rain falls for 13.1 days and regularly aggregates up to 2.68" (68mm) of precipitation. In Slidell, during the entire year, the rain falls for 173.3 days and collects up to 30.79" (782mm) of precipitation.Snowfall
February through December are months without snowfall.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 6:38 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 5:09 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 threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: An average maximum UV index of 3 in December leads to these recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Slidell, LA
- Average high temperature in December: 62.1°F
The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (59.4°F).
- Average low temperature in December: 49.5°F
The month with the highest average low temperature is August (77.4°F).
The coldest month (with the lowest average low temperature) is January (45.1°F).
Average pressure in December
Slidell, LA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed in December
Slidell, LA
- Average wind speed in December: 7.4mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity in December
Slidell, LA
- Average humidity in December: 79%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in December
Slidell, LA
- Average rainfall in December: 2.68"
The wettest month (with the highest rainfall) is August (4.92").
The driest month (with the least rainfall) is November (1.5").
Average rainfall days in December
Slidell, LA
- Average rainfall days in December: 13.1 days
The month with the highest number of rainy days is August (23.5 days).
The month with the least rainy days is November (8 days).
Average snowfall in December
Slidell, LA
- Average snowfall in December: 0"
The month with the highest snowfall is January (0.2").
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
Slidell, LA
- Average snowfall days in December: 0.2 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, October and November (0 days).
Average daylight in December /
Average sunshine in December
Slidell, LA
- Average daylight in December: 10h and 12min
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 6min
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 6min).
Average sunshine days in December
Slidell, LA
- Average sunshine days in December: 16.4 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is August (5.1 days).
Average UV index in December
Slidell, 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
Slidell, LA
- Average cloud cover in December: 45
The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility in December
Slidell, 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).
