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
The arrival of September denotes a barely perceptible change in the average high-temperatures to a still tropical 86.5°F (30.3°C) from August's 89.2°F (31.8°C). An average low-temperature of 73.2°F (22.9°C) is common during the nights of September.Heat index
For September, the heat index is computed to be a sweltering 100.4°F (38°C). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'real feel' or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children regularly disregard the necessity to rest and replenish fluids. Thirst is a late symptom of dehydration - thus, maintaining hydration, particularly during long-lasting physical activities, is essential.
Normally, the human body cools itself through perspiration, which removes excessive heat by evaporating sweat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
In Des Allemands, the average relative humidity in September is 77%.Rainfall
In September, the rain falls for 15.7 days. Throughout September, 1.22" (31mm) of precipitation is accumulated. Throughout the year, there are 141.6 rainfall days, and 15.71" (399mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
The average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:23 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:48 pm CDT.
Sunshine
In Des Allemands, the average sunshine in September is 10.3h.UV index
May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.Note: The UV index of 7 in September translates into these instructions:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Des Allemands during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the month with the highest UV index?
What is the UV index reading in September?
Average temperature in September
Des Allemands, LA
- Average high temperature in September: 86.5°F
The warmest month (with the highest average high temperature) is July (89.8°F).
The month with the lowest average high temperature is January (60.8°F).
- Average low temperature in September: 73.2°F
The month with the highest average low temperature is August (77°F).
The coldest month (with the lowest average low temperature) is January (46.9°F).
Average pressure in September
Des Allemands, LA
- Average pressure in September: 29.97"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.97"Hg).
Average wind speed in September
Des Allemands, LA
- Average wind speed in September: 5.9mph
The windiest months (with the highest average wind speed) are February and April (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.4mph).
Average humidity in September
Des Allemands, LA
- Average humidity in September: 77%
The months with the highest relative humidity are February, July, August and December (78%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Des Allemands, LA
- Average rainfall in September: 1.22"
The wettest month (with the highest rainfall) is July (2.83").
The driest month (with the least rainfall) is March (0.71").
Average rainfall days in September
Des Allemands, LA
- Average rainfall days in September: 15.7 days
The month with the highest number of rainy days is August (19.5 days).
The month with the least rainy days is November (6.7 days).
Average snowfall days in September
Des Allemands, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Des Allemands, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in September: 10h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Des Allemands, LA
- Average sunshine days in September: 11.6 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is August (8.2 days).
Average UV index in September
Des Allemands, LA
- Average UV index in September: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Des Allemands, LA
- Average cloud cover in September: 25
The month with the most cloud cover is December (Cloud cover 45).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility in September
Des Allemands, LA
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Des Allemands, Louisiana, USA
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