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April Weather in Slidell, United States

Last updated: June 24, 2025

In April, the average temperature in Slidell, United States is a pleasant 20°C (69°F), making it an ideal time to explore. Expect temperatures to range from a cool 8°C (47°F) at night to a warm 28°C (83°F) during the day. However, be prepared for fluctuating weather, as 126 mm (5.0 in) of precipitation can occur over approximately 10 days. With an average humidity of 78%, you may want to pack accordingly for a comfortable visit!

April Temperature in Slidell

In April in Slidell, the average temperature is 20°C (69°F). Maximum temperatures can reach 28°C (83°F), while minimum temperatures can be as low as 8°C (47°F). This mild climate makes Slidell an ideal destination for travelers seeking comfortable weather and a variety of outdoor activities.

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

The chart illustrates April 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, April typically has an average temperature of 20°C (69°F), with highs reaching up to 28°C (83°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec545964697781838380746157
Data source: Temperature data for Slidell generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

April Precipitation in Slidell

In Slidell in April, the total precipitation amount is 126 mm (5.0 in) spread over a duration of 10 days.

April Precipitation Trends in Slidell

The chart displays monthly precipitation patterns in Slidell, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Slidell, April typically receives around 126 mm (5.0 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec981078012614022318922413012760103
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Slidell

In Slidell in April, humidity is 78%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick and heavy, urging you to seek out shaded areas and refreshing drinks.

April Average Humidity in Slidell

This chart illustrates the average monthly humidity levels in Slidell, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Slidell is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%78%73%71%79%78%80%76%83%87%
Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Slidell

In Slidell in April, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Slidell.

Maximum UV Index Levels in Slidell for April

The chart shows the monthly maximum UV Index (UVI) for Slidell in April, 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 April, the maximum UV index in Slidell typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec589111112121110864
Data source: Slidell April 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 April 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 April’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 April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)98 mm (3.9 inches)82%moderate
February Weather15°C (59°F)107 mm (4.2 inches)80%very high
March Weather18°C (65°F)80 mm (3.1 inches)80%very high
April Weather20°C (69°F)126 mm (5.0 inches)78%extreme
May Weather25°C (77°F)140 mm (5.5 inches)73%extreme
June Weather27°C (81°F)223 mm (8.8 inches)71%extreme
July Weather28°C (83°F)189 mm (7.4 inches)79%extreme
August Weather28°C (83°F)224 mm (8.8 inches)78%extreme
September Weather27°C (80°F)130 mm (5.1 inches)80%very high
October Weather23°C (74°F)126 mm (5.0 inches)76%very high
November Weather16°C (61°F)60 mm (2.3 inches)83%high
December Weather14°C (57°F)103 mm (4.1 inches)87%moderate

Compare Slidell's Climate with Cities Worldwide