January Weather in Slidell, United States

Last updated: June 24, 2025

In Slidell, United States, the average temperature in January hovers around 12°C (54°F), with fluctuations from a chilly -6°C (21°F) to a warm 25°C (78°F). Expect about 98 mm (3.9 in) of precipitation over approximately 8 days, and brace yourself for an average humidity level of 82%, making this month a mix of brisk air and potential showers.

January Temperature in Slidell

In January in Slidell, the average temperature is 12°C (54°F). Maximum temperatures can reach 25°C (78°F), while minimums can dip as low as -6°C (21°F). It's a great time for travelers to experience a mix of pleasantly warm and chilly weather, so be sure to pack accordingly for your adventures!

January Weather in Slidell: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Slidell, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Slidell, January typically has an average temperature of 12°C (54°F), with highs reaching up to 25°C (78°F) and lows dropping to around -6°C (21°F).

Data source: Temperature data for Slidell generated using information from the Copernicus Climate Change Service.

January Precipitation in Slidell

In Slidell in January, the total precipitation amount is 98 mm (3.9 in), occurring over 8 days.

January Precipitation Trends in Slidell

The chart displays monthly precipitation patterns in Slidell, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Slidell, January typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

January Humidity in Slidell

In Slidell in January humidity is 82%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making every step feel sluggish and sweat-inducing, which can be quite uncomfortable for traveling.

January Average Humidity in Slidell

This chart illustrates the average monthly humidity levels in Slidell, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Slidell is approximately 82%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Slidell

In Slidell in January, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Slidell.

Maximum UV Index Levels in Slidell for January

The chart shows the monthly maximum UV Index (UVI) for Slidell in January, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In January, the maximum UV index in Slidell typically reaches 5, which falls under the moderate exposure category.

Data source: Slidell January UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How January Weather in Slidell Compares to Other Months

Weather in Slidell varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Slidell, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Slidell, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	98 mm (3.9 inches)	82%	moderate
February Weather	15°C (59°F)	107 mm (4.2 inches)	80%	very high
March Weather	18°C (65°F)	80 mm (3.1 inches)	80%	very high
April Weather	20°C (69°F)	126 mm (5.0 inches)	78%	extreme
May Weather	25°C (77°F)	140 mm (5.5 inches)	73%	extreme
June Weather	27°C (81°F)	223 mm (8.8 inches)	71%	extreme
July Weather	28°C (83°F)	189 mm (7.4 inches)	79%	extreme
August Weather	28°C (83°F)	224 mm (8.8 inches)	78%	extreme
September Weather	27°C (80°F)	130 mm (5.1 inches)	80%	very high
October Weather	23°C (74°F)	126 mm (5.0 inches)	76%	very high
November Weather	16°C (61°F)	60 mm (2.3 inches)	83%	high
December Weather	14°C (57°F)	103 mm (4.1 inches)	87%	moderate