Cool
Average highs are around 18°C, so pack for cooler days.
December verdict
Slidell, Louisiana, United States in December
Weather score27Poor
Poor for holiday weather
Average highs are around 18°C, so pack for cooler days. Sunshine averages 5.2h per day, enough for a balanced month. Rainfall averages 137mm, so some wet days are possible.
December weather
Monthly averages
Temp
18°C
Rain
137mm
Sun
5.2h
Sea
15°C
Weather score
27
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 137mm, so some wet days are possible.
Some sun
Sunshine averages 5.2h per day, enough for a balanced month.
Cool sea
Sea temperatures average 15°C, so the water can feel cool.
Map
Weather map
Compare Slidell, Louisiana, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December18°C average high
December has some of the coolest average daytime highs of the year, so pack for fresher conditions.
Warmest monthsMay to September
This stretch sets the upper range for average daytime heat.
Rain
December137mm average rain
December is wetter than Slidell's yearly average, so flexible plans matter more.
Driest monthsJune and October to November
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December5.2 hours average sun
December is one of Slidell's cloudier months, so sunshine-led plans are less reliable.
Brightest monthsApril to July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December15°C average sea
December is below Slidell's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJune to September
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
December27 weather score
December is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsMay to October
These months have the strongest weather score in the monthly averages.
