Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's average high-temperature is a still hot 88.3°F (31.3°C), maintaining a close comparison with August's 91.9°F (33.3°C). Greenwell Springs temperatures generally rest at a low of 70°F (21.1°C) during the September nights.Heat index
September's heat index is calculated to be a blistering 105.8°F (41°C). Greater preventive actions are needed, heat exhaustion and heat cramps are likely. Persistent activity could provoke heatstroke.Heat index specifics point out values are for conditions of shade and a slight breeze. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.
The human body has a built-in cooling mechanism through perspiration; evaporating sweat dissipates the excess heat. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. With body temperatures on the rise, inefficient heat shedding can lead to dehydration and its associated complications.
Humidity
In September, the average relative humidity is 78%.Rainfall
March and September are months with the least rain when the rain falls for 9.7 days and typically aggregates up to 0.28" (7mm) of rain.Snowfall
February through November are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of September in Greenwell Springs, sunrise is at 6:40 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:50 pm CDT.
Sunshine
In Greenwell Springs, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 6 in September leads to these recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Greenwell Springs have in September?
What time are sunrise and sunset in September in Greenwell Springs?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Greenwell Springs, LA
- Average high temperature in September: 88.3°F
The warmest month (with the highest average high temperature) is July (92.3°F).
The month with the lowest average high temperature is January (58.8°F).
- Average low temperature in September: 70°F
The month with the highest average low temperature is August (74.3°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in September
Greenwell Springs, LA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Greenwell Springs, LA
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are February and April (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.3mph).
Average humidity in September
Greenwell Springs, LA
- Average humidity in September: 78%
The months with the highest relative humidity are February and December (81%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Greenwell Springs, LA
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is July (1.1").
The driest months (with the least rainfall) are March and September (0.28").
Average rainfall days in September
Greenwell Springs, LA
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is July (12.4 days).
The month with the least rainy days is November (4.6 days).
Average snowfall days in September
Greenwell Springs, LA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Greenwell Springs, 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 3min
The months with the most sunshine are June and August (Average sunshine: 10h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).
Average sunshine days in September
Greenwell Springs, LA
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is November (24.1 days).
The month with the least sunshine days is July (12.5 days).
Average UV index in September
Greenwell Springs, LA
- Average UV index in September: 6
The months with the highest UV index are May, 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
Greenwell Springs, LA
- Average cloud cover in September: 33
The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 29).
Average visibility in September
Greenwell Springs, LA
- Average visibility in September: 5mi
The months with the highest visibility are October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September and December (5mi).
Greenwell Springs, Louisiana, USA
Weather forecast for your location
2. Allow the app to use your location