September weather forecast
Destrehan, LA

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Weather in September

September, the first month of the autumn in Destrehan, is still a hot month, with temperature in the range of an average high of 86.5°F (30.3°C) and an average low of 74.1°F (23.4°C).

Temperature

As Destrehan steps into September, the average high-temperature is measured at a still hot 86.5°F (30.3°C), displaying minor differences from August's 89.1°F (31.7°C). Throughout September, Destrehan anticipates an average low-temperature of 74.1°F (23.4°C).

Heat index

The heat index value during September is evaluated at a very hot 98.6°F (37°C). Incorporate additional preventive steps, heat exhaustion and heat cramps are possible. Long-lasting activity may cause heatstroke.
One should consider that heat index numbers are for shaded settings and light wind. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are primarily vital for children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
The body's inherent cooling system operates through perspiration, wherein evaporating sweat offsets excessive heat. With a lot of moisture in the air, the evaporation process is not as effective, and the body does not cool down as efficiently, creating a perception of overheating. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.

Humidity

In September, the average relative humidity is 76%.

Rainfall

In Destrehan, in September, during 19.9 rainfall days, 2.83" (72mm) of precipitation is typically accumulated. In Destrehan, during the entire year, the rain falls for 180.8 days and collects up to 33.39" (848mm) of precipitation.

Snowfall

In Destrehan, snow does not fall in February through November.

Daylight

In September, the average length of the day is 12h and 20min.
On the first day of the month, sunrise is at 6:38 am and sunset at 7:23 pm. On the last day of September, sunrise is at 6:54 am and sunset at 6:47 pm CDT.

Sunshine

In September, the average sunshine is 10.2h.

UV index

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, a daily maximum UV index of 6 leads to the following instructions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. The Sun's UV radiation is at its strongest between the hours of 10 a.m. and 4 p.m. Minimize direct exposure to the sun during this period. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.

Frequently asked questions

How hot does it get in September?

The high-temperature during September is 86.5°F (30.3°C) and the low-temperature is 74.1°F (23.4°C). The average heat index (a.k.a. 'feels like', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in September is evaluated at 98.6°F (37°C).

What is the average humidity in September in Destrehan?

In September, the average relative humidity is 76%.

How many days does it rain in September?

In September, the rain falls for 19.9 days. Throughout September, 2.83" (72mm) of precipitation is accumulated.

When it does not snow?

In Destrehan, snow does not fall in February through November.

How many hours of daylight does Destrehan have in September?

In Destrehan, the average day length in September is 12h and 20min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:38 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:54 am and sunset at 6:47 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration is 10.2h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Destrehan, LA

Average temperature in September - Destrehan, LA
  • Average high temperature in September: 86.5°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (60.4°F).

  • Average low temperature in September: 74.1°F

The month with the highest average low temperature is August (77.5°F).
The coldest month (with the lowest average low temperature) is January (47.3°F).

Average pressure in September
Destrehan, LA

Average pressure in September - Destrehan, LA
  • Average pressure in September: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).

Average wind speed in September
Destrehan, LA

Average wind speed in September - Destrehan, LA
  • Average wind speed in September: 6.2mph

The windiest months (with the highest average wind speed) are February and April (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average humidity in September
Destrehan, LA

Average humidity in September - Destrehan, LA
  • Average humidity in September: 76%

The months with the highest relative humidity are February and December (78%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September
Destrehan, LA

Average rainfall in September - Destrehan, LA
  • Average rainfall in September: 2.83"

The wettest month (with the highest rainfall) is July (5.39").
The driest month (with the least rainfall) is November (1.5").

Average rainfall days in September
Destrehan, LA

Average rainfall days in September - Destrehan, LA
  • Average rainfall days in September: 19.9 days

The month with the highest number of rainy days is August (23.7 days).
The month with the least rainy days is November (8.4 days).

Average snowfall days in September
Destrehan, LA

Average snowfall days in September - Destrehan, LA
  • Average snowfall days in September: 0 days

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

Average daylight in September /
Average sunshine in September
Destrehan, LA

Average daylight in September / Average sunshine in September - Destrehan, LA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).

  • Average sunshine in September: 10h and 1min

The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

Average sunshine days in September
Destrehan, LA

Average sunshine days in September - Destrehan, LA
  • Average sunshine days in September: 7.9 days

The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is August (4.8 days).

Average UV index in September
Destrehan, LA

Average UV index in September - Destrehan, 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
Destrehan, LA

Average cloud cover in September - Destrehan, 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
Destrehan, LA

Average visibility in September - Destrehan, 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).

Destrehan, Louisiana, USA

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