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 start of September involves a subtle temperature drop, shifting from 94.5°F (34.7°C) in August to a still tropical 88.2°F (31.2°C). September nights observe an average temperature dip to an enjoyable 67.1°F (19.5°C).Heat index
During September, the heat index is calculated to be a torrid 100.4°F (38°C). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.Data suggests that the heat index is set for environments in shade and with a light wind. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. Excessive relative humidity disturbs the body's typical cooling process by reducing evaporation, leading to a decrease in body cooling rate and an increase in the sensation of warmth. When the heat gained surpasses the body's cooling capacity, temperatures rise, signaling potential health concerns.
Humidity
In September, the average relative humidity is 70%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.5 days and typically collects 1.97" (50mm) of precipitation.Snowfall
April through December are months without snowfall.Daylight
The average length of the day in September in Cotton Valley is 12h and 22min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:38 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:59 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 suggests these recommendations:
Put precautions into practice - Protective measures against sun-induced damage are advised. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September in Cotton Valley?
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?
What time are sunrise and sunset in September?
How many hours of sunshine does Cotton Valley have in September?
What is the UV index intensity in September in Cotton Valley?
Average temperature in September
Cotton Valley, LA
- Average high temperature in September: 88.2°F
The warmest month (with the highest average high temperature) is July (94.6°F).
The month with the lowest average high temperature is January (53.2°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (73.2°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).
Average pressure in September
Cotton Valley, 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 (29.93"Hg).
Average wind speed in September
Cotton Valley, LA
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Cotton Valley, LA
- Average humidity in September: 70%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Cotton Valley, LA
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is April (4.65").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in September
Cotton Valley, LA
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (14.3 days).
The months with the least rainy days are October and November (10.1 days).
Average snowfall in September
Cotton Valley, LA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.67").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Cotton Valley, LA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.4 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
Cotton Valley, 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 2min
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
Cotton Valley, LA
- Average sunshine days in September: 17.5 days
The month with the most sunshine days is October (19.6 days).
The month with the least sunshine days is February (13.5 days).
Average UV index in September
Cotton Valley, LA
- Average UV index in September: 5
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, November and December (UV index 3).
Average cloud cover in September
Cotton Valley, LA
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Cotton Valley, LA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Cotton Valley, Louisiana, USA
Weather forecast for your location
2. Allow the app to use your location