September weather forecast
Jean Lafitte, LA

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Weather in September

September, the first month of the autumn in Jean Lafitte, is still a tropical month, with an average temperature varying between 75.4°F (24.1°C) and 86.5°F (30.3°C).

Temperature

Upon the onset of September, Jean Lafitte witnesses an average high-temperature of a still hot 86.5°F (30.3°C), showing a close resemblance to the prior month. Jean Lafitte records an average temperature drop to a moderately hot 75.4°F (24.1°C) in September.

Heat index

The heat index value during September is computed to be a sweltering 98.6°F (37°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.
When referencing the heat index, its values are suitable for shady environments and light breezes. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Youngsters frequently overlook the need for breaks and fluid intake. Thirst is an advanced sign of dehydration - thereby highlighting the importance of keeping hydrated, particularly during long physical activities.
Perspiration is the body's default response to elevated temperatures, as it promotes the evaporation of sweat to achieve cooling. When the level of relative humidity is elevated, evaporation diminishes, causing more warmth to be retained in the body than in dry air. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.

Humidity

The average relative humidity in September is 74%.

Rainfall

In Jean Lafitte, during September, the rain falls for 15.7 days and regularly aggregates up to 1.1" (28mm) of precipitation. Throughout the year, there are 137.6 rainfall days, and 14.84" (377mm) of precipitation is accumulated.

Snowfall

February through December are months without snowfall.

Daylight

In September, the average length of the day is 12h and 20min.
On the first day of September, sunrise is at 6:38 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:46 pm CDT.

Sunshine

In Jean Lafitte, the average sunshine in September is 10.3h.

UV index

The months with the highest UV index are May through September, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum UV index of 7 during September translates into these guidelines:
Avoid excessive sunlight. Those with lighter skin may experience burning in less than 20 minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.

Frequently asked questions

How hot is September?

Jean Lafitte in September has an average high-temperature of 86.5°F (30.3°C) and an average low-temperature of 75.4°F (24.1°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is computed to be 98.6°F (37°C).

What is the average humidity in September?

In September, the average relative humidity is 74%.

How much does it rain in September?

In Jean Lafitte, in September, it is raining for 15.7 days, with typically 1.1" (28mm) of accumulated precipitation.

When it does not snow?

In Jean Lafitte, snow does not fall in February through December.

How many hours of daylight does Jean Lafitte have in September?

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

When are sunrise and sunset in September?

On the first day of September, sunrise is at 6:38 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:46 pm CDT.

How long on average sun shines in September?

In Jean Lafitte, the average sunshine duration in September is 10.3h.

What are the months with the highest UV index?

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

How high is the UV index in September?

In Jean Lafitte, Louisiana, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.
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
Jean Lafitte, LA

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

The warmest month (with the highest average high temperature) is July (89.4°F).
The month with the lowest average high temperature is January (60.6°F).

  • Average low temperature in September: 75.4°F

The month with the highest average low temperature is August (78.4°F).
The coldest month (with the lowest average low temperature) is January (48.6°F).

Average pressure in September
Jean Lafitte, LA

Average pressure in September - Jean Lafitte, 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
Jean Lafitte, LA

Average wind speed in September - Jean Lafitte, LA
  • Average wind speed in September: 6.6mph

The windiest months (with the highest average wind speed) are February and April (9.3mph).
The calmest month (with the lowest average wind speed) is July (6mph).

Average humidity in September
Jean Lafitte, LA

Average humidity in September - Jean Lafitte, LA
  • Average humidity in September: 74%

The months with the highest relative humidity are February and December (77%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
Jean Lafitte, LA

Average rainfall in September - Jean Lafitte, LA
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is July (2.72").
The driest month (with the least rainfall) is January (0.63").

Average rainfall days in September
Jean Lafitte, LA

Average rainfall days in September - Jean Lafitte, LA
  • Average rainfall days in September: 15.7 days

The month with the highest number of rainy days is August (20 days).
The month with the least rainy days is November (5.8 days).

Average snowfall days in September
Jean Lafitte, LA

Average snowfall days in September - Jean Lafitte, 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, November and December (0 days).

Average daylight in September /
Average sunshine in September
Jean Lafitte, LA

Average daylight in September / Average sunshine in September - Jean Lafitte, 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 2min

The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

Average sunshine days in September
Jean Lafitte, LA

Average sunshine days in September - Jean Lafitte, LA
  • Average sunshine days in September: 10.4 days

The month with the most sunshine days is November (22 days).
The month with the least sunshine days is August (7.8 days).

Average UV index in September
Jean Lafitte, LA

Average UV index in September - Jean Lafitte, LA
  • Average UV index in September: 7

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

Average cloud cover in September
Jean Lafitte, LA

Average cloud cover in September - Jean Lafitte, LA
  • Average cloud cover in September: 24

The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 23).

Average visibility in September
Jean Lafitte, LA

Average visibility in September - Jean Lafitte, 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).

Jean Lafitte, Louisiana, USA

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