Louisiana, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Slidell, LA

The first month of the winter, December, is still a comfortable month in Slidell, Louisiana, with average temperature varying between 64°F (17.8°C) and 42.1°F (5.6°C).


In December, the average high-temperature slightly decreases, from an agreeable 71.1°F (21.7°C) in November, to a comfortable 64°F (17.8°C). In December, the average low-temperature is 42.1°F (5.6°C).


Throughout December, in Slidell, Louisiana, 4.7" (119.1mm) of precipitation is accumulated. During the entire year, Slidell aggregates up to 62.7" (1591.7mm) of precipitation.


The month with the shortest days in Slidell is December, with an average of 10.2h of daylight.

What is the temperature in December in Slidell?

The average high-temperature, in December, in Slidell, is 64°F (17.8°C), while the average low-temperature is 42.1°F (5.6°C).

How much does it rain in Slidell in December?

During December, Slidell regularly aggregates up to 4.7" (119.1mm) of precipitation.

What is the month with the shortest days in Slidell?

With an average of 10.2h of daylight, December has the shortest days of the year.

How many hours of daylight does Slidell have in December?

In December, the average length of the day in Slidell is 10.2h.
Average temperature in December - Slidell, LA
  • Average high temperature in December: 64°F

Warmest months (with the highest average high temperature) are July and August (91°F).
The month with the lowest average high temperature is January (61°F).

  • Average low temperature in December: 42°F

The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (40°F).

Average rainfall in December - Slidell, LA
  • Average rainfall in December: 4.7"

The wettest month (with the highest rainfall) is July (6.6").
The driest month (with the lowest rainfall) is October (3.1").

Average daylight in December - Slidell, LA
  • Average daylight in December: 10.2h

The month with the longest days is June (Average daylight: 14.1h).
The month with shortest days is December (Average daylight: 10.2h).