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 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
With the advent of September, Leonville's high-temperatures adjust to a still hot 86.9°F (30.5°C), closely aligning with the preceding month. During the September nights, an average temperature of 69.6°F (20.9°C) is observed in Leonville.Heat index
For most parts of September, the heat index is estimated at a very hot 102.2°F (39°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.Heat index readings emphasize conditions of light breezes and shaded spots. Direct sunlight exposure may cause a 15 Fahrenheit (8 Celsius) degrees rise in the heat index.
Note: The heat index, also known as 'felt air temperature' or 'real feel', joins air temperature with relative humidity to produce a temperature perception for humans. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. 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 relevant to children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When there is an excess of moisture in the atmosphere, the efficiency of the evaporation process is lessened, leading to less efficient body cooling and a sensation of overheating. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
In September, the average relative humidity is 80%.Rainfall
In Leonville, Louisiana, in September, during 15.1 rainfall days, 1.73" (44mm) of precipitation is typically accumulated. Throughout the year, in Leonville, there are 157.2 rainfall days, and 24.69" (627mm) of precipitation is accumulated.Snowfall
In Leonville, snow does not fall in February through December.Daylight
In September, the average length of the day is 12h and 20min.On the first day of September, sunrise is at 6:44 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
In Leonville, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A typical high UV index of 6 in September suggests the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Frequently asked questions
Is it hot in Leonville during September?
What is the average humidity in September in Leonville?
How many days does it rain in September in Leonville?
When it does not snow in Leonville?
How many hours of daylight does Leonville have in September?
When is the sunrise / sunset in September in Leonville?
How many hours of sunshine does Leonville have in September?
What is the UV index reading in September in Leonville?
Average temperature in September
Leonville, LA
- Average high temperature in September: 86.9°F
The warmest months (with the highest average high temperature) are July and August (90.5°F).
The month with the lowest average high temperature is January (58.3°F).
- Average low temperature in September: 69.6°F
The months with the highest average low temperature are July and August (73.9°F).
The coldest month (with the lowest average low temperature) is January (43°F).
Average pressure in September
Leonville, 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
Leonville, LA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is February (7.6mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).
Average humidity in September
Leonville, 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
Leonville, LA
- Average rainfall in September: 1.73"
The wettest month (with the highest rainfall) is August (3.19").
The driest month (with the least rainfall) is November (1.46").
Average rainfall days in September
Leonville, LA
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is August (18.7 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in September
Leonville, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Leonville, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Leonville, 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 month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Leonville, LA
- Average sunshine days in September: 13 days
The month with the most sunshine days is October (19.6 days).
The month with the least sunshine days is August (9.4 days).
Average UV index in September
Leonville, LA
- Average UV index in September: 6
The months with the highest UV index are May, June and July (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Leonville, 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 28).
Average visibility in September
Leonville, 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).
Leonville, Louisiana, USA
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