September weather forecast
Delta, LA

Weather in September

The first month of the autumn, September, is still a tropical month in Delta, Louisiana, with temperature in the range of an average low of 67.6°F (19.8°C) and an average high of 87.8°F (31°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still hot 87.8°F (31°C). In September, in Delta, the average low-temperature is 67.6°F (19.8°C).

Heat index

In September, the average heat index is calculated to be a very hot 101.3°F (38.5°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like clothing, wind, pregnancy, and activity influence one's weather impression. 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

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

Rainfall

In Delta, it is raining for 15 days, with typically 2.48" (63mm) of accumulated precipitation. In Delta, during the entire year, the rain falls for 169.7 days and collects up to 38.82" (986mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In September, the average length of the day in Delta is 12h and 21min.
On the first day of September in Delta, sunrise is at 6:38 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:50 pm CDT.

Sunshine

In Delta, the average sunshine in September is 9.8h.

UV index

The average daily maximum UV index in September in Delta is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 6 in September transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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 September in Delta?

The average high-temperature, in September, is 87.8°F (31°C), while the average low-temperature is 67.6°F (19.8°C). In September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, is calculated to be 101.3°F (38.5°C).

What is the average humidity in September in Delta?

The average relative humidity in September in Delta is 73%.

How much does it rain in Delta in September?

In Delta, in September, during 15 rainfall days, 2.48" (63mm) of precipitation is typically accumulated.

When it does not snow in Delta?

In Delta, Louisiana, snow does not fall in April through October.

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

The average day length in September in Delta, Louisiana, is 12h and 21min.

When are sunrise and sunset in September in Delta?

In September, on the first day of the month, sunrise is at 6:38 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:50 pm CDT.

How many hours of sunshine does Delta have in September?

In Delta, the average sunshine duration in September is 9.8h.

What is the UV index intensity in September in Delta?

In September, the average daily maximum UV index in Delta, Louisiana, is 6. A UV Index estimate of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.

Average temperature in September
Delta, LA

Average temperature in September - Delta, LA
  • Average high temperature in September: 87.8°F

The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (54.1°F).

  • Average low temperature in September: 67.6°F

The month with the highest average low temperature is July (72.7°F).
The coldest month (with the lowest average low temperature) is January (39.6°F).

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Average pressure in September
Delta, LA

Average pressure in September - Delta, LA
  • Average pressure in September: 29.99"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

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Average wind speed in September
Delta, LA

Average wind speed in September - Delta, LA
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is February (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in September
Delta, LA

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

The months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is October (69%).

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Average rainfall in September
Delta, LA

Average rainfall in September - Delta, LA
  • Average rainfall in September: 2.48"

The wettest month (with the highest rainfall) is April (3.98").
The driest month (with the least rainfall) is November (2.28").

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Average rainfall days in September
Delta, LA

Average rainfall days in September - Delta, LA
  • Average rainfall days in September: 15 days

The month with the highest number of rainy days is August (19.3 days).
The month with the least rainy days is October (8.9 days).

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Average snowfall in September
Delta, LA

Average snowfall in September - Delta, LA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.43").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Delta, LA

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

The month with the highest number of snowfall days is January (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Delta, LA
  • Average daylight in September: 12h and 21min

The month with the longest days is June (Average daylight: 14h and 14min).
The month with the shortest days is December (Average daylight: 10h and 4min).

  • Average sunshine in September: 9.8h

The month with the most sunshine is June (Average sunshine: 10.6h).
The months with the least sunshine are February and December (Average sunshine: 5).

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Average sunshine days in September
Delta, LA

Average sunshine days in September - Delta, LA
  • Average sunshine days in September: 12.8 days

The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is August (9.9 days).

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Average UV index in September
Delta, LA

Average UV index in September - Delta, LA
  • Average UV index in September: 6

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

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Average cloud cover in September
Delta, LA

Average cloud cover in September - Delta, LA
  • Average cloud cover in September: 29

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is October (Cloud cover 27).

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Average visibility in September
Delta, LA

Average visibility in September - Delta, 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).

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