December weather forecast
Mandeville, LA

Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
°Celsius°Fahrenheit
Share

Contents

Weather in December

Wrapping up the year in Mandeville, Louisiana, December sees temperatures dropping further from 48.9°F (9.4°C) to 61.9°F (16.6°C), hinting at the arrival of the nearing Winter. Coinciding with the Winter Solstice, daylight hours reach their shortest at an average of 10.2 hours per day. With lowest UV indices and considerable cloud cover, it suggests a decided inclination towards inclement weather. Average rainfall increases to 3.94" (100mm) and could include an occasional snowfall every couple of years. The dominant chill of December and the anticipation of snowfall add a festive aura to the city's climate.

Temperature

During the shift to December in Mandeville, a minor reduction in average high-temperature is observed, shifting from a pleasant 68.4°F (20.2°C) in November to a comfortable 61.9°F (16.6°C). Mandeville's nights in December cool down to an average low-temperature of 48.9°F (9.4°C).

Humidity

The most humid month is December, with an average relative humidity of 79%.

Rainfall

In Mandeville, during December, the rain falls for 14.3 days and regularly aggregates up to 3.94" (100mm) of precipitation. In Mandeville, during the entire year, the rain falls for 183.7 days and collects up to 43.94" (1116mm) of precipitation.

Snowfall

February through December are months without snowfall in Mandeville.

Ocean temperature

In December, the average ocean temperature is 60.4°F (15.8°C).
Note: Swimming is not a pleasant activity for most when the water temperature is 60.4°F (15.8°C). As the water temperature drops from 69.8°F (21°C) to 59°F (15°C), breathing becomes more difficult to control.

Daylight

With an average of 10h and 12min of daylight, December has the shortest days of the year in Mandeville.
On the first day of the month, sunrise is at 6:39 am and sunset at 4:59 pm. On the last day of December, sunrise is at 6:56 am and sunset at 5:10 pm CST.

Sunshine

December has the least sunshine of the year in Mandeville, with an average of 5.1h of sunshine.

UV index

December is the month with the lowest UV index, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 3 in December transforms into the following instructions:
Act with care - Obligation to protect against skin and eye damage is highlighted. To guard against the harmful effects of the Sun, minimize exposure during midday. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
[Resources]

Frequently asked questions

What are the temperatures in Mandeville in December?

In December, the average high-temperature and low-temperature are 61.9°F (16.6°C) and 48.9°F (9.4°C) respectively. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is evaluated at 102.2°F (39°C).

What is the most humid month in Mandeville?

With an average relative humidity of 79%, December is the most humid month in Mandeville.

What is the average humidity in December in Mandeville?

In December, the average relative humidity in Mandeville, Louisiana, is 79%.

How many days does it rain in December in Mandeville?

In Mandeville, in December, during 14.3 rainfall days, 3.94" (100mm) of precipitation is typically accumulated.

When it does not snow in Mandeville?

In Mandeville, Louisiana, snow does not fall in February through December.

Does it snow in Mandeville in December?

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

How cold is the water in December in Mandeville?

In December, the average ocean temperature in Mandeville is 60.4°F (15.8°C). For swimming, a surface water temperature of 60.4°F (15.8°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

What is the month with the shortest days in Mandeville?

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

How many hours of daylight does Mandeville have in December?

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

When is the sunrise / sunset in December in Mandeville?

In December, on the first day of the month, sunrise is at 6:39 am and sunset at 4:59 pm. On the last day of the month, in Mandeville, Louisiana, sunrise is at 6:56 am and sunset at 5:10 pm CST.

What is the month with the least sunshine in Mandeville?

December has the least sunshine of the year in Mandeville, with an average of 5.1h of sunshine.

How many hours of sunshine does Mandeville have in December?

In Mandeville, the average sunshine duration in December is 5.1h.

What is the month with the lowest UV index in Mandeville?

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

What is the UV index intensity in December in Mandeville?

The average daily maximum UV index in December in Mandeville is 3. A UV Index reading of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJFMAMJJASONDecember
Nov
December
Jan
Average high temperature
68.4°F 20.2°C
61.9°F 16.6°C
59.2°F 15.1°C
Average low temperature
52.9°F 11.6°C
48.9°F 9.4°C
44.8°F 7.1°C
Average pressure
30.13" 765mmHg
30.13" 765mmHg
30.16" 766mmHg
Average wind speed
7mph 11.3km/h
7.3mph 11.7km/h
7.5mph 12.1km/h
Average max. wind speed
7.6mph 12.2km/h
8mph 12.9km/h
8.1mph 13km/h
Average wind speed gusts
11.6mph 18.7km/h
12.1mph 19.5km/h
12.2mph 19.6km/h
Average humidity
73%
79%
75%
Average rainfall
1.93" 49mm
3.94" 100mm
2.68" 68mm
Average rainfall days
8.2
14.3
11.2
Average snowfall
0" 0mm
0" 0mm
0.08" 2mm
Average snowfall days
0
0.1
0.2
Average sea temperature
68.1°F 20.1°C
60.3°F 15.7°C
56.6°F 13.7°C
Average daylight
10h 4min
10h 1min
10h 2min
Average sunshine
6h 1min
5h 1min
5h 4min
Average sunshine days
19.8
15.4
17.8
Average UV index
4
3
4
Average cloud cover
32%
46%
38%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in December
Mandeville, LA

Average temperature in December - Mandeville, LA
  • Average high temperature in December: 61.9°F

The warmest month (with the highest average high temperature) is August (91°F).
The month with the lowest average high temperature is January (59.2°F).

  • Average low temperature in December: 48.9°F

The months with the highest average low temperature are July and August (76.8°F).
The coldest month (with the lowest average low temperature) is January (44.8°F).

[Resources]

Average pressure in December
Mandeville, LA

Average pressure in December - Mandeville, LA
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).

[Resources]

Average wind speed in December
Mandeville, LA

Average wind speed in December - Mandeville, LA
  • Average wind speed in December: 7.3mph

The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

[Resources]

Average humidity in December
Mandeville, LA

Average humidity in December - Mandeville, 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 (71%).

[Resources]

Average rainfall in December
Mandeville, LA

Average rainfall in December - Mandeville, LA
  • Average rainfall in December: 3.94"

The wettest month (with the highest rainfall) is August (6.73").
The driest month (with the least rainfall) is November (1.93").

[Resources]

Average rainfall days in December
Mandeville, LA

Average rainfall days in December - Mandeville, LA
  • Average rainfall days in December: 14.3 days

The month with the highest number of rainy days is August (23.8 days).
The month with the least rainy days is November (8.2 days).

[Resources]

Average snowfall in December
Mandeville, LA

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

The month with the highest snowfall is January (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

[Resources]

Average snowfall days in December
Mandeville, LA

Average snowfall days in December - Mandeville, LA
  • Average snowfall days in December: 0.1 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 and November (0 days).

[Resources]

Average sea temperature in December
Mandeville, LA

Average sea temperature in December - Mandeville, LA
  • Average sea temperature in December: 60.3°F

The best month for swimming (with the highest average sea temperature) is August (86.4°F).
The coldest month (with the lowest average sea temperature) is January (56.6°F).

[Resources]

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

Average daylight in December / Average sunshine in December - Mandeville, 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: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

[Resources]

Average sunshine days in December
Mandeville, LA

Average sunshine days in December - Mandeville, LA
  • Average sunshine days in December: 15.4 days

The month with the most sunshine days is November (19.8 days).
The month with the least sunshine days is August (5.6 days).

[Resources]

Average UV index in December
Mandeville, LA

Average UV index in December - Mandeville, 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).

[Resources]

Average cloud cover in December
Mandeville, LA

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

The month with the most cloud cover is December (Cloud cover 46).
The month with the least cloud cover is October (Cloud cover 24).

[Resources]

Average visibility in December
Mandeville, LA

Average visibility in December - Mandeville, 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).

[Resources]

Mandeville, Louisiana, USA

Weather forecast for today
Weather forecast for tomorrow
10 days weather forecast
Climate data
1January
2February
3March
4April
5May
6June
7July
8August
9September
10October
11November
12December

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location