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
During the shift to September, Keithville records a mild decrease in average high-temperature, moving from a very hot 95.2°F (35.1°C) in August to a hot 88.9°F (31.6°C). Keithville's nighttime temperature in September drops to an average of 68.2°F (20.1°C).Heat index
September's average heat index is estimated at a torrid 102.2°F (39°C). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.Know that the heat index computations account for shaded terrains and slight winds. Direct exposure to sunshine could lead to a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. The experience of temperature can be subjective, varying based on the individual's activity and heat perception, influenced by factors like wind, attire, and metabolic variations. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. An increase in relative humidity hinders the body's normal cooling function by reducing evaporation, thereby decreasing the rate of body cooling and enhancing the sense of warmth. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.
Humidity
In Keithville, the average relative humidity in September is 68%.Rainfall
In Keithville, in September, during 12.9 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In Keithville, during the entire year, the rain falls for 152.7 days and collects up to 35.98" (914mm) of precipitation.Snowfall
In Keithville, snow does not fall in April through October.Daylight
In Keithville, the average length of the day in September is 12h and 21min.On the first day of September in Keithville, sunrise is at 6:50 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 7:00 pm CDT.
Sunshine
In Keithville, the average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September in Keithville is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: A daily high UV index of 6 in September leads to these guidelines:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
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 in Keithville?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Keithville have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Keithville have in September?
How high is the UV index in September?
Average temperature in September
Keithville, LA
- Average high temperature in September: 88.9°F
The warmest month (with the highest average high temperature) is July (95.4°F).
The month with the lowest average high temperature is January (54.1°F).
- Average low temperature in September: 68.2°F
The month with the highest average low temperature is July (74.1°F).
The coldest month (with the lowest average low temperature) is January (38.8°F).
Average pressure in September
Keithville, 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
Keithville, LA
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest months (with the lowest average wind speed) are July, August and September (5.3mph).
Average humidity in September
Keithville, LA
- Average humidity in September: 68%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (66%).
Average rainfall in September
Keithville, LA
- Average rainfall in September: 2.17"
The wettest month (with the highest rainfall) is April (4.25").
The driest month (with the least rainfall) is July (1.93").
Average rainfall days in September
Keithville, LA
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is October (9.5 days).
Average snowfall in September
Keithville, LA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Keithville, LA
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in September /
Average sunshine in September
Keithville, LA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 9h and 3min
The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Keithville, LA
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is February (13 days).
Average UV index in September
Keithville, 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
Keithville, LA
- Average cloud cover in September: 29
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Keithville, LA
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and February (5mi).
Keithville, Louisiana, USA
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