September weather forecast
Sunset, LA

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Weather in September

September, the first month of the autumn in Sunset, is still a tropical month, with temperature in the range of an average high of 86.9°F (30.5°C) and an average low of 69.6°F (20.9°C).

Temperature

September notes an average high-temperature of a still hot 86.9°F (30.5°C), subtly differing from August's 90.1°F (32.3°C). In Sunset, an average low-temperature of 69.6°F (20.9°C) is recorded during September nights.

Heat index

The heat index in September is calculated to be a fiery hot 102.2°F (39°C). Take extra safety measures to prevent heat exhaustion and heat cramps. Heatstroke could follow lengthy activity.
Know that the heat index computations account for shaded terrains and slight winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The individual's impression of temperature can be shaped by additional aspects such as metabolic variations, physical activity, and clothing. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Juveniles are regularly less conscious of the need to recuperate and rehydrate. Thirst is a tardy symptom of dehydration - hydration, especially during lengthy physical activities, should be maintained.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. When body temperature rises due to an imbalance in heat gain, there's a potential for dehydration and overheating.

Humidity

In September, the average relative humidity is 80%.

Rainfall

In Sunset, in September, it is raining for 14.5 days, with typically 0.87" (22mm) of accumulated precipitation. In Sunset, during the entire year, the rain falls for 135 days and collects up to 12.44" (316mm) of precipitation.

Snowfall

February through November are months without snowfall.

Daylight

In Sunset, the average length of the day in September is 12h and 20min.
On the first day of September, sunrise is at 6:45 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:54 pm CDT.

Sunshine

The average sunshine in September is 9.6h.

UV index

The average daily maximum UV index in September in Sunset is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for the ordinary person.
Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Beware of overexposure. Fair-skinned individuals risk 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. Enhance your sun protection with tightly woven, yet airy clothing.
Updated: Jun 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

The high-temperature during September is 86.9°F (30.5°C) and the low-temperature is 69.6°F (20.9°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which factors the actual air temperature with the relative humidity, in September is calculated to be 102.2°F (39°C).

What is the average humidity in September?

The average relative humidity in September is 80%.

How many days does it rain in September?

In Sunset, in September, it is raining for 14.5 days, with typically 0.87" (22mm) of accumulated precipitation.

When it does not snow?

February through November are months without snowfall.

How many hours of daylight does Sunset have in September?

The average day length in September is 12h and 20min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:45 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:54 pm CDT.

How many hours of sunshine does Sunset have in September?

The average sunshine duration in September in Sunset is 9.6h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.
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
Sunset, LA

Average temperature in September - Sunset, LA
  • Average high temperature in September: 86.9°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (58.3°F).

  • Average low temperature in September: 69.6°F

The month with the highest average low temperature is August (73.8°F).
The coldest month (with the lowest average low temperature) is January (43°F).

Average pressure in September
Sunset, LA

Average pressure in September - Sunset, LA
  • Average pressure in September: 29.96"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in September
Sunset, LA

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

The windiest month (with the highest average wind speed) is February (8mph).
The calmest month (with the lowest average wind speed) is July (5mph).

Average humidity in September
Sunset, LA

Average humidity in September - Sunset, LA
  • Average humidity in September: 80%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is October (73%).

Average rainfall in September
Sunset, LA

Average rainfall in September - Sunset, LA
  • Average rainfall in September: 0.87"

The wettest month (with the highest rainfall) is July (1.77").
The driest month (with the least rainfall) is March (0.59").

Average rainfall days in September
Sunset, LA

Average rainfall days in September - Sunset, LA
  • Average rainfall days in September: 14.5 days

The month with the highest number of rainy days is August (17.3 days).
The month with the least rainy days is November (7.1 days).

Average snowfall in September
Sunset, LA

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

The month with the highest snowfall is December (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October and November (0").

Average snowfall days in September
Sunset, LA

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

The month with the highest number of snowfall days is January (0.4 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).

  • Average sunshine in September: 9h and 4min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

Average sunshine days in September
Sunset, LA

Average sunshine days in September - Sunset, LA
  • Average sunshine days in September: 12 days

The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is August (8.3 days).

Average UV index in September
Sunset, LA

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

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

Average cloud cover in September
Sunset, LA

Average cloud cover in September - Sunset, LA
  • Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is October (Cloud cover 27).

Average visibility in September
Sunset, LA

Average visibility in September - Sunset, LA
  • Average visibility in September: 5mi

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

Sunset, Louisiana, USA

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