Slidell (LA) Weather & Climate: Best Time to Visit

The climate in Slidell is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 33°C (91°F) in August to a moderate 16°C (61°F) in the coolest month, January.

Nights vary from 23°C (73°F) in August to around 5°C (41°F) during the colder months.

Check out our detailed temperature page for more information.

Temperature ranges by month

Slidell has a notably wet climate with abundant precipitation, recording 1498 mm (59 in) of rainfall per year. The climate in Slidell shows significant variation throughout the year. Expect heavy rainfall in August, the wettest month, with an average of 197 mm (7.8 in) of precipitation over 17 rainy days.

In contrast, the driest month November offers drier and sunnier days, with around 69 mm (2.7 in) of rainfall over 7 rainy days. For more details, please visit our Slidell Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

For those who appreciate different seasons, Slidell serves as an ideal destination. Expect longer, more sun-filled days in May with an average of 9.3 hours of sunshine daily, and embrace the darker days in January, offering only 5.1 hours of daily sunlight.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Slidell.

The city experiences its highest humidity in July, reaching 79%. In February, the humidity drops to its lowest level at 73%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year