May weather forecast and climate
Slidell, LA

Weather in May

May, the last month of the spring, in Slidell, is also a moderately hot month, with average temperature varying between 68.5°F (20.3°C) and 83.8°F (28.8°C).

Temperature

In May, the average high-temperature marginally rises, from 77.4°F (25.2°C) in April, to a still moderately hot 83.8°F (28.8°C). The average low-temperature, in Slidell, is 68.5°F (20.3°C).

Heat index

In May, the average heat index is appraised at a hot 91°F (32.8°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Additional factors like activity, metabolic differences, wind, and differences in body mass, height, and shape affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in Slidell is 73%.

Rainfall

In Slidell, it is raining for 13.3 days, with typically 2.68" (68mm) of accumulated precipitation. Throughout the year, there are 173.3 rainfall days, and 30.79" (782mm) of precipitation is accumulated.

Snowfall

In Slidell snow does not fall in February through December.

Daylight

The average length of the day in May is 13.7h.

Sunshine

The average sunshine in May is 10.6h.

UV index

Months with the highest UV index in Slidell are May through August, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from the exposure to the Sun's UV radiation for the average person.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in May in Slidell?

In Slidell, in May, the average high-temperature is 83.8°F (28.8°C), and the average low-temperature is 68.5°F (20.3°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), that combines both air temperature and relative humidity, in May is calculated to 91°F (32.8°C).

What is the average humidity in May in Slidell?

In May, the average relative humidity in Slidell is 73%.

How many days does it rain in May in Slidell?

In May, the rain falls for 13.3 days. Throughout May, 2.68" (68mm) of precipitation is accumulated.

When it does not snow in Slidell?

In Slidell, Louisiana, snow does not fall in February through December.

How many hours of daylight does Slidell have in May?

In May, the average length of the day in Slidell, Louisiana, is 13.7h.

How long on average sun shines in May in Slidell?

In Slidell, Louisiana, the average sunshine in May is 10.6h.

What is the month with the highest UV index in Slidell?

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

How high is the UV index in May in Slidell?

In May, the average daily maximum UV index in Slidell is 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to the Sun's UV rays.

Average temperature in May
Slidell, LA

Average temperature in May - Slidell, LA
  • Average high temperature in May: 83.8°F

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).

  • Average low temperature in May: 68.5°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 in May
Slidell, LA

Average pressure in May - Slidell, LA
  • Average pressure in May: 30"

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

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Average wind speed in May
Slidell, LA

Average wind speed in May - Slidell, LA
  • Average wind speed in May: 6.7mph

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 humidity in May
Slidell, LA

Average humidity in May - Slidell, LA
  • Average humidity in May: 73%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in May
Slidell, LA

Average rainfall in May - Slidell, LA
  • Average rainfall in May: 2.68"

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 in May
Slidell, LA

Average rainfall days in May - Slidell, LA
  • Average rainfall days in May: 13.3 days

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 in May
Slidell, LA

Average snowfall in May - Slidell, LA
  • Average snowfall in May: 0"

The month with the highest snowfall is January (0.2").
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 in May
Slidell, LA

Average snowfall days in May - Slidell, LA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (0.3 days).
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 in May /
Average sunshine in May
Slidell, LA

Average daylight in May / Average sunshine in May - Slidell, LA
  • Average daylight in May: 13.7h

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in May: 10.6h

The month with the most sunshine is June (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 5.1h).

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Average sunshine days in May
Slidell, LA

Average sunshine days in May - Slidell, LA
  • Average sunshine days in May: 14.8 days

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 UV index in May
Slidell, LA

Average UV index in May - Slidell, LA
  • Average UV index in May: 7

Months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).

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Average cloud cover in May
Slidell, LA

Average cloud cover in May - Slidell, LA
  • Average cloud cover in May: 27

The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is October (Cloud cover 24).

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Average visibility in May
Slidell, LA

Average visibility in May - Slidell, LA
  • Average visibility in May: 6mi

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

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