Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Slidell marks the arrival of September with an average high-temperature of a still tropical 87.3°F (30.7°C), hardly different from August's 90.7°F (32.6°C). An average temperature of 73.4°F (23°C) marks the nights in Slidell in September.Heat index
The heat index value for September is calculated to be a fiery hot 100.4°F (38°C). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.Note that heat index values are valued for light wind and location in the shade. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. In direct sunlight, the heat's impact can be heightened, potentially leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. When heat uptake goes beyond the body's cooling mechanisms, there's a surge in body temperature, posing health risks.
Humidity
The average relative humidity in September is 75%.Rainfall
In September, in Slidell, Louisiana, the rain falls for 18.4 days. Throughout September, 2.4" (61mm) of precipitation is accumulated. 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
In September, the average length of the day in Slidell is 12h and 20min.On the first day of September, sunrise is at 6:36 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 6:45 pm CDT.
Sunshine
The average sunshine in September is 10.3h.UV index
In September, the average daily maximum UV index in Slidell is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 6 in September translates into these instructions:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Frequently asked questions
How hot is it in Slidell in September?
What is the average humidity in September in Slidell?
How many days does it rain in September in Slidell?
When it does not snow in Slidell?
How many hours of daylight does Slidell have in September?
When is the sunrise / sunset in September in Slidell?
How many hours of sunshine does Slidell have in September?
What is the UV index intensity in September in Slidell?
Average temperature in September
Slidell, LA
- Average high temperature in September: 87.3°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 September: 73.4°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).
Average pressure in September
Slidell, LA
- Average pressure in September: 29.98"Hg
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).
Average wind speed in September
Slidell, LA
- Average wind speed in September: 5.7mph
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).
Average humidity in September
Slidell, LA
- Average humidity in September: 75%
The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Slidell, LA
- Average rainfall in September: 2.4"
The wettest month (with the highest rainfall) is August (4.92").
The driest month (with the least rainfall) is November (1.5").
Average rainfall days in September
Slidell, LA
- Average rainfall days in September: 18.4 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).
Average snowfall in September
Slidell, LA
- Average snowfall in September: 0"
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").
Average snowfall days in September
Slidell, LA
- Average snowfall days in September: 0.1 days
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).
Average daylight in September /
Average sunshine in September
Slidell, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 10h and 2min
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).
Average sunshine days in September
Slidell, LA
- Average sunshine days in September: 8.1 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).
Average UV index in September
Slidell, LA
- Average UV index in September: 6
The 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).
Average cloud cover in September
Slidell, LA
- Average cloud cover in September: 25
The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility in September
Slidell, LA
- Average visibility in September: 6mi
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).
Slidell, Louisiana, USA
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