September weather forecast
Big Island, LA

Share

Weather in September

The first month of the autumn, September, is still a hot month in Big Island, Louisiana, with an average temperature fluctuating between 68°F (20°C) and 87.8°F (31°C).

Temperature

Big Island records an average high-temperature of a still hot 87.8°F (31°C) in September, closely mirroring the climate of the previous month. Big Island temperatures generally rest at a low of 68°F (20°C) during the September nights.

Heat index

September's mean heat index is computed to be a scorching 104°F (40°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.
Be advised, the heat index considers values for conditions in shade and with a light breeze. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. 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 particularly relevant to children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Evaporating sweat is a key way the human body dispels excessive warmth, all thanks to the process of perspiration. Heightened relative humidity interferes with the body's usual cooling mechanism by reducing evaporation, subsequently decreasing the body's cooling rate and increasing the sensation of heat. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.

Humidity

In September, the average relative humidity is 76%.

Rainfall

In Big Island, in September, it is raining for 14.9 days, with typically 2.01" (51mm) of accumulated precipitation. In Big Island, Louisiana, during the entire year, the rain falls for 152.3 days and collects up to 23.66" (601mm) of precipitation.

Snowfall

April through November are months without snowfall.

Daylight

In Big Island, the average length of the day in September is 12h and 20min.
On the first day of the month, sunrise is at 6:45 am and sunset at 7:31 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:54 pm CDT.

Sunshine

The average sunshine in September is 9.4h.

UV index

In Big Island, 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 the average person.
Note: A maximum high UV index of 6 in September translates into the following recommendations:
Continue precautions and advocate sun safety advice. Deterrence of sunburn is indispensable. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.

Frequently asked questions

Is it hot during September?

In September, in Big Island, the average high-temperature is 87.8°F (31°C), and the average low-temperature is 68°F (20°C). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines air temperature and relative humidity, is computed to be 104°F (40°C).

What is the average humidity in September?

In September, the average relative humidity in Big Island is 76%.

How much does it rain in September?

In Big Island, in September, it is raining for 14.9 days, with typically 2.01" (51mm) of accumulated precipitation.

When it does not snow?

In Big Island, Louisiana, snow does not fall in April through November.

What is the average length of the day in September?

In Big Island, 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 6:45 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:54 pm CDT.

How many hours of sunshine does Big Island have in September?

In Big Island, the average sunshine duration in September is 9.4h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Big Island, LA

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

The warmest month (with the highest average high temperature) is July (92.8°F).
The month with the lowest average high temperature is January (56.1°F).

  • Average low temperature in September: 68°F

The months with the highest average low temperature are July and August (73°F).
The coldest month (with the lowest average low temperature) is January (40.5°F).

Average pressure in September
Big Island, LA

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

The month with the highest atmospheric pressure is January (30.17"Hg).
The months with the lowest atmospheric pressure are June and August (29.95"Hg).

Average wind speed in September
Big Island, LA

Average wind speed in September - Big Island, LA
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is February (7.1mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).

Average humidity in September
Big Island, LA

Average humidity in September - Big Island, LA
  • Average humidity in September: 76%

The month with the highest relative humidity is February (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
Big Island, LA

Average rainfall in September - Big Island, LA
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is August (2.95").
The driest month (with the least rainfall) is November (1.22").

Average rainfall days in September
Big Island, LA

Average rainfall days in September - Big Island, LA
  • Average rainfall days in September: 14.9 days

The month with the highest number of rainy days is August (17.7 days).
The month with the least rainy days is November (8.5 days).

Average snowfall in September
Big Island, LA

Average snowfall in September - Big Island, LA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.55").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in September
Big Island, LA

Average snowfall days in September - Big Island, LA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Big Island, LA

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

The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 12min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

Average sunshine days in September
Big Island, LA

Average sunshine days in September - Big Island, LA
  • Average sunshine days in September: 12.5 days

The month with the most sunshine days is October (20.9 days).
The month with the least sunshine days is August (10.1 days).

Average UV index in September
Big Island, LA

Average UV index in September - Big Island, 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).

Average cloud cover in September
Big Island, LA

Average cloud cover in September - Big Island, LA
  • Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is October (Cloud cover 29).

Average visibility in September
Big Island, LA

Average visibility in September - Big Island, LA
  • Average visibility in September: 5mi

The months with the highest visibility are January, February, March, June, October, November and December (6mi).
The months with the lowest visibility are April, May, July, August and September (5mi).

Big Island, Louisiana, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location