Climate and monthly weather forecast
Slidell, LA

Weather in January

January, like December, is another mild winter month in Slidell, Louisiana, with an average temperature varying between 59.4°F (15.2°C) and 45.1°F (7.3°C). The coldest month is January, with an average high-temperature of 59.4°F (15.2°C) and an average low-temperature of 45.1°F (7.3°C). Weather in January »

Weather in February

The last month of the winter, February, is an enjoyable month in Slidell, Louisiana, with an average temperature varying between 64°F (17.8°C) and 49.8°F (9.9°C). In February, the average high-temperature is practically the same as in January - an enjoyable 64°F (17.8°C). Weather in February »

Weather in March

March, the first month of the spring in Slidell, is a pleasant month, with an average temperature ranging between max 70.7°F (21.5°C) and min 55.6°F (13.1°C). In Slidell, the average high-temperature in March slightly increases from an enjoyable 64°F (17.8°C) in February to a pleasant 70.7°F (21.5°C). Weather in March »

Weather in April

April in Slidell, Louisiana, is a warm spring month, with an average temperature varying between 61.7°F (16.5°C) and 77.4°F (25.2°C). In Slidell, the average high-temperature in April slightly increases from a pleasant 70.7°F (21.5°C) in March to a warm 77.4°F (25.2°C). Weather in April »

Weather in May

The last month of the spring, May, is another warm month in Slidell, Louisiana, with an average temperature ranging between min 68.5°F (20.3°C) and max 83.8°F (28.8°C). In Slidell, Louisiana, the average high-temperature in May slightly increases from a warm 77.4°F (25.2°C) in April to a still moderately hot 83.8°F (28.8°C). Weather in May »

Weather in June

June, the first month of the summer in Slidell, is a tropical month, with temperature in the range of an average high of 90°F (32.2°C) and an average low of 75.4°F (24.1°C). In June, the average high-temperature slightly increases from a moderately hot 83.8°F (28.8°C) in May to a hot 90°F (32.2°C). Weather in June »

Weather in July

July, like June, is another hot summer month in Slidell, Louisiana, with an average temperature varying between 77°F (25°C) and 90.9°F (32.7°C). July is the warmest month, with an average high-temperature of 90.9°F (32.7°C) and an average low-temperature of 77°F (25°C). In July, the average heat index is appraised at an extremely hot 111.2°F (44°C). Weather in July »

Weather in August

August, the last month of the summer in Slidell, is also a hot month, with an average temperature fluctuating between 77.4°F (25.2°C) and 90.7°F (32.6°C). In Slidell, the average high-temperature in August is essentially the same as in July - a still tropical 90.7°F (32.6°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a tropical month in Slidell, Louisiana, with temperature in the range of an average low of 73.4°F (23°C) and an average high of 87.3°F (30.7°C). In Slidell, the average high-temperature in September is almost the same as in August - a still tropical 87.3°F (30.7°C). Weather in September »

Weather in October

October, like September, in Slidell, Louisiana, is a moderately hot autumn month, with an average temperature ranging between min 63.7°F (17.6°C) and max 79.3°F (26.3°C). In October, the average high-temperature slightly decreases from a tropical 87.3°F (30.7°C) in September to a warm 79.3°F (26.3°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an agreeable month in Slidell, Louisiana, with an average temperature fluctuating between 53.1°F (11.7°C) and 68.4°F (20.2°C). In November, the average high-temperature drops from a moderately hot 79.3°F (26.3°C) in October to an agreeable 68.4°F (20.2°C). Weather in November »

Weather in December

The first month of the winter, December, is still a comfortable month in Slidell, Louisiana, with an average temperature varying between 49.5°F (9.7°C) and 62.1°F (16.7°C). In Slidell, the average high-temperature in December marginally drops from a pleasant 68.4°F (20.2°C) in November to an enjoyable 62.1°F (16.7°C). Weather in December »
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FAQ

What is the coldest month in Slidell?

The coldest month in Slidell is January, with an average high-temperature of 59.4°F (15.2°C) and an average low-temperature of 45.1°F (7.3°C).

How many days does it rain in Slidell?

Throughout the year, in Slidell, Louisiana, there are 173.3 rainfall days, and 30.79" (782mm) of precipitation is accumulated.

When does it snow in Slidell?

The only month with snowfall is January.

When does it snow the most in Slidell?

The month with the most snowfall is January, when snow falls for 0.3 days and typically aggregates up to 0.2" (5mm) of snow.

How many days does it snow in Slidell?

Throughout the year, there are 0.6 snowfall days, and 0.2" (5mm) of snow is accumulated.

When it does not snow in Slidell?

February through December are months without snowfall.

When is Daylight Saving Time (DST) in Slidell?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

When is the highest UV index in Slidell?

May through August, with an average maximum UV index of 7, are months with the highest UV index in Slidell.

When are the longest days in Slidell?

With an average of 14h and 4min of daylight, June has the longest days of the year.

What month has the most sunshine in Slidell?

The month with the most sunshine is June, with an average of 11.1h of sunshine.

What is the warmest month in Slidell?

With an average high-temperature of 90.9°F (32.7°C) and an average low-temperature of 77°F (25°C), July is the warmest month in Slidell, Louisiana.

What is the rainiest month in Slidell?

August is the month with the most rainfall in Slidell. Rain falls for 23.5 days and accumulates 4.92" (125mm) of precipitation.

What is the least humid month in Slidell?

October is the least humid month, with an average relative humidity of 70%.

What is the driest month in Slidell?

The month with the least rainfall in Slidell, Louisiana, is November, when the rain falls for 8 days and typically collects 1.5" (38mm) of precipitation.

What is the most humid month in Slidell?

December is the most humid month in Slidell, with an average relative humidity of 79%.

What is the month with the shortest days in Slidell?

With an average of 10h and 14min of daylight, December has the shortest days of the year.

What is the month with the least sunshine in Slidell?

The month with the least sunshine is December, with an average of 5.1h of sunshine.

When is the lowest UV index in Slidell?

The month with the lowest UV index is December, with an average maximum UV index of 3.

Average temperature
Slidell, LA

Average temperature - Slidell, LA

The warmest month (with the highest average high temperature) is July (90.9°F).
The month with the lowest average high temperature is January (59.4°F).

The month with the highest average low temperature is August (77.4°F).
The coldest month (with the lowest average low temperature) is January (45.1°F).

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Average pressure
Slidell, LA

Average pressure - Slidell, LA

The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).

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Average wind speed
Slidell, LA

Average wind speed - Slidell, LA

The windiest month (with the highest average wind speed) is April (8mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).

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Average rainfall
Slidell, LA

Average rainfall - Slidell, LA

The wettest month (with the highest rainfall) is August (4.92").
The driest month (with the least rainfall) is November (1.5").

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Average rainfall days
Slidell, LA

Average rainfall days - Slidell, LA

The month with the highest number of rainy days is August (23.5 days).
The month with the least rainy days is November (8 days).

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Average snowfall
Slidell, LA

Average snowfall - Slidell, LA

The month with the highest snowfall is January (0.2").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days
Slidell, LA

Average snowfall days - Slidell, LA

The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are February, March, April, May, June, July, August, October and November (0 days).

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Average daylight / Average sunshine
Slidell, LA

Average daylight / Average sunshine - Slidell, LA

The month with the longest days is June (Average daylight: 14h and 4min).
The month with the shortest days is December (Average daylight: 10h and 14min).

The month with the most sunshine is June (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

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Average sunshine days
Slidell, LA

Average sunshine days - Slidell, LA

The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is August (5.1 days).

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Average visibility
Slidell, LA

Average visibility - Slidell, LA

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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