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
The beginning of September brings a slight decrease in the average high-temperature, transitioning from 93.7°F (34.3°C) in August to a still tropical 87.8°F (31°C). Throughout September nights, Haynesville registers an average low-temperature of 66.7°F (19.3°C).Heat index
The average heat index in September is evaluated at a sweltering 100.4°F (38°C). Incorporate special precautions, risk of heat exhaustion and heat cramps is substantial. Sustained activity could cause heatstroke.The heat index's values are generally associated with conditions in shade and light breezes. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is found by incorporating humidity levels into the air temperature measurement. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. When exposed to direct sunlight, it's possible for the heat index to increase by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite 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.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Accumulating heat beyond the body's cooling measures leads to rising temperatures and potential ailments.
Humidity
The average relative humidity in September is 71%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.2 days and typically collects 2.01" (51mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September in Haynesville is 12h and 22min.On the first day of the month, sunrise is at 6:47 am and sunset at 7:37 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:58 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index of 6 during September translates into these guidelines:
Avert overexposure. Light-skinned people might experience burning in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Haynesville?
What is the average humidity in September in Haynesville?
What is the driest month?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Haynesville, LA
- Average high temperature in September: 87.8°F
The warmest month (with the highest average high temperature) is July (94.1°F).
The month with the lowest average high temperature is January (53.2°F).
- Average low temperature in September: 66.7°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (37.6°F).
Average pressure in September
Haynesville, LA
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Haynesville, LA
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in September
Haynesville, LA
- Average humidity in September: 71%
The months with the highest relative humidity are February and December (81%).
The months with the lowest relative humidity are July and August (70%).
Average rainfall in September
Haynesville, LA
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is April (4.25").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
Haynesville, LA
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is July (15 days).
The months with the least rainy days are October and November (10.4 days).
Average snowfall in September
Haynesville, LA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.75").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Haynesville, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Haynesville, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Haynesville, LA
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is October (19.7 days).
The month with the least sunshine days is February (13.8 days).
Average UV index in September
Haynesville, LA
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Haynesville, LA
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 52).
The months with the least cloud cover are August and September (Cloud cover 29).
Average visibility in September
Haynesville, LA
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
Haynesville, Louisiana, USA
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