September weather forecast
Terrytown, LA

Weather in September

The first month of the autumn, September, is still a tropical month in Terrytown, Louisiana, with temperature in the range of an average high of 86.5°F (30.3°C) and an average low of 76.3°F (24.6°C).

Temperature

In Terrytown, the average high-temperature is almost the same as in August - a still tropical 86.5°F (30.3°C). In Terrytown, in September, the average low-temperature is 76.3°F (24.6°C).

Heat index

In September, the average heat index is computed to be a sweltering 97.9°F (36.6°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 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', 'feels like', 'apparent temperature', or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like activity, differences in body mass, height, and shape, pregnancy, and wind affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

The average relative humidity in Terrytown is 73%.

Rainfall

In Terrytown, in September, during 11.7 rainfall days, 0.47" (12mm) of precipitation is typically accumulated. Throughout the year, in Terrytown, there are 112.1 rainfall days, and 9.37" (238mm) of precipitation is accumulated.

Snowfall

February through December are months without snowfall in Terrytown.

Daylight

The average length of the day in Terrytown, Louisiana, is 12.3h.

Sunshine

The average sunshine in September is 10.1h.

UV index

Months with the highest UV index in Terrytown are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Terrytown?

The average high-temperature, in September, in Terrytown, Louisiana, is 86.5°F (30.3°C), while the average low-temperature is 76.3°F (24.6°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 97.9°F (36.6°C).

What is the average humidity in September in Terrytown?

In September, the average relative humidity in Terrytown, Louisiana, is 73%.

How many days does it rain in September in Terrytown?

In Terrytown, Louisiana, in September, during 11.7 rainfall days, 0.47" (12mm) of precipitation is typically accumulated.

When it does not snow in Terrytown?

In Terrytown snow does not fall in February through December.

What is the average length of the day in September in Terrytown?

The average length of the day in September in Terrytown, Louisiana, is 12.3h.

How many hours of sunshine does Terrytown have in September?

In Terrytown, the average sunshine in September is 10.1h.

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

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

How high is the UV index in September in Terrytown?

In Terrytown, the average daily maximum UV index in September is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in September
Terrytown, LA

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

The warmest months (with the highest average high temperature) are July and August (89.4°F).
The month with the lowest average high temperature is January (60.4°F).

  • Average low temperature in September: 76.3°F

The month with the highest average low temperature is August (79.5°F).
The coldest month (with the lowest average low temperature) is January (48.6°F).

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Average pressure in September
Terrytown, LA

Average pressure in September - Terrytown, LA
  • Average pressure in September: 29.97"

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

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Average wind speed in September
Terrytown, LA

Average wind speed in September - Terrytown, LA
  • Average wind speed in September: 7.1mph

The windiest months (with the highest average wind speed) are February and April (9.8mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).

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Average humidity in September
Terrytown, LA

Average humidity in September - Terrytown, LA
  • Average humidity in September: 73%

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

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Average rainfall in September
Terrytown, LA

Average rainfall in September - Terrytown, LA
  • Average rainfall in September: 0.47"

The wettest month (with the highest rainfall) is July (1.57").
The driest months (with the least rainfall) are March and April (0.43").

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Average rainfall days in September
Terrytown, LA

Average rainfall days in September - Terrytown, LA
  • Average rainfall days in September: 11.7 days

The month with the highest number of rainy days is August (17.2 days).
The month with the least rainy days is November (4.7 days).

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Average snowfall days in September
Terrytown, LA

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

The month with the highest number of snowfall days is January (0.1 days).
Months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).

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

Average daylight in September / Average sunshine in September - Terrytown, LA
  • Average daylight in September: 12.3h

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 September: 10.1h

The month with the most sunshine is June (Average sunshine: 11h).
The month with the least sunshine is December (Average sunshine: 5.1h).

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Average sunshine days in September
Terrytown, LA

Average sunshine days in September - Terrytown, LA
  • Average sunshine days in September: 12.5 days

The month with the most sunshine days is November (23.5 days).
The month with the least sunshine days is August (8.9 days).

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Average UV index in September
Terrytown, LA

Average UV index in September - Terrytown, LA
  • Average UV index in September: 7

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).

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Average cloud cover in September
Terrytown, LA

Average cloud cover in September - Terrytown, LA
  • Average cloud cover in September: 25

The month with the most cloud cover is December (Cloud cover 44).
The month with the least cloud cover is October (Cloud cover 24).

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Average visibility in September
Terrytown, LA

Average visibility in September - Terrytown, LA
  • Average visibility in September: 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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