New Orleans
Louisiana, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
New Orleans, LA

Commuter buses on the street in New Orleans, Louisiana, with a view of the city buildings and palm trees along the roadsides
Commuter buses on the street in New Orleans, Louisiana, with a view of the city buildings and palm trees along the roadsides
The first month of the autumn, Septiembre, is still a tropical month in New Orleans, Louisiana, with average temperature ranging between max 87.4°F (30.8°C) and min 72°F (22.2°C).

Temperature

In New Orleans, Louisiana, the average high-temperature is practically the same as in Agosto - a still tropical 87.4°F (30.8°C). In New Orleans, the average low-temperature is 72°F (22.2°C).

Heat index

The average heat index is appraised at a very hot 103.1°F (39.5°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', 'apparent temperature', 'felt air temperature', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, clothing, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. 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

In Septiembre, the average relative humidity is 77.8%.

Rainfall

In New Orleans, during 9.4 rainfall days, 4.97" (126.2mm) of precipitation is typically accumulated. Throughout the year, in New Orleans, there are 114.8 rainfall days, and 62.44" (1586.1mm) of precipitation is accumulated.

Daylight

In New Orleans, the average length of the day in Septiembre is 12.3h.

Sunshine

In New Orleans, the average sunshine is 7.6h.

UV index

In New Orleans, Louisiana, the average daily maximum UV index is 9. A UV Index of 8 to 10 symbolizes a very high health risk from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 9 transform into the following instructions:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. 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. 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim.

What is the temperature in Septiembre in New Orleans?

The average high-temperature, in Septiembre, is 87.4°F (30.8°C), while the average low-temperature is 72°F (22.2°C). In Septiembre, the average heat index (a.k.a. 'felt air temperature', 'real feel'), that combines both air temperature and relative humidity, is appraised at 103.1°F (39.5°C).

What is the average humidity in Septiembre in New Orleans?

The average relative humidity in Septiembre in New Orleans, Louisiana, is 77.8%.

How many days does it rain in Septiembre in New Orleans?

In New Orleans, in Septiembre, during 9.4 rainfall days, 4.97" (126.2mm) of precipitation is typically accumulated.

What is the average length of the day in Septiembre in New Orleans?

The average length of the day in Septiembre in New Orleans is 12.3h.

How many hours of sunshine does New Orleans have in Septiembre?

In Septiembre, the average sunshine is 7.6h.

What is the UV index reading in Septiembre in New Orleans?

The average daily maximum UV index in Septiembre is 9. A UV Index estimate of 8 to 10 represents a very high hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - New Orleans, LA
  • Average high temperature in September: 87.5°F

Warmest months (with the highest average high temperature) are July and August (91.2°F).
The month with the lowest average high temperature is January (62.1°F).

  • Average low temperature in September: 72°F

Months with the highest average low temperature are July and August (75.3°F).
The coldest month (with the lowest average low temperature) is January (44.7°F).

Average humidity in September - New Orleans, LA
  • Average humidity in September: 77.8%

The month with the highest relative humidity is August (79.4%).
The month with the lowest relative humidity is March (72.9%).

Average rainfall in September - New Orleans, LA
  • Average rainfall in September: 5"

The wettest month (with the highest rainfall) is June (8.1").
The driest month (with the lowest rainfall) is October (3.5").

Average rainfall days in September - New Orleans, LA
  • Average rainfall days in September: 9.4 days

The month with the highest number of rainy days is July (13.6 days).
The month with the lowest number of rainy days is April (6.9 days).

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

The month with the longest days is June (Average daylight: 14.1h).
The month with shortest days is December (Average daylight: 10.2h).

  • Average sunshine in September: 7.6h

The month with most sunshine is June (Average sunshine: 9.1h).
The month with least sunshine is January (Average sunshine: 4.9h).

Average UV index in September - New Orleans, LA
  • Average UV index in September: 9

Months with the highest UV index are June and July (UV index 11).
Months with the lowest UV index are January and December (UV index 4).