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
In September, Roanoke experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 90.5°F (32.5°C) in August to a still hot 86.9°F (30.5°C). Nighttime temperature lowers to an average of 70.9°F (21.6°C) in September.Heat index
In September, the average heat index is evaluated at a sweltering 102.2°F (39°C). Take more preventive steps, risk of heat exhaustion and heat cramps is elevated. Long activity may culminate in heatstroke.Heat index evaluations are typically in the context of light winds and shaded environments. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Children frequently do not understand the need for recuperation and hydration. Thirst, being a late manifestation of dehydration, underlines the need to hydrate frequently, especially when engaging in prolonged physical exercises.
The human body cools itself through perspiration, as excessive warmth is removed from the body through sweat evaporation. With a high level of moisture in the air, the evaporation process becomes less efficient, preventing the body from cooling down efficiently and resulting in a sensation of overheating. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
In Roanoke, Louisiana, the average relative humidity in September is 78%.Rainfall
In Roanoke, during September, the rain falls for 13.5 days and regularly aggregates up to 1.14" (29mm) of precipitation. In Roanoke, during the entire year, the rain falls for 143.2 days and collects up to 16.42" (417mm) of precipitation.Snowfall
February through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:33 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:57 pm CDT.
Sunshine
In Roanoke, the average sunshine in September is 9.9h.UV index
In Roanoke, Louisiana, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Roanoke have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Roanoke have in September?
What is the UV index intensity in September?
Average temperature in September
Roanoke, LA
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is August (90.5°F).
The month with the lowest average high temperature is January (59°F).
- Average low temperature in September: 70.9°F
The month with the highest average low temperature is July (75.4°F).
The coldest month (with the lowest average low temperature) is January (44.2°F).
Average pressure in September
Roanoke, 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 (29.94"Hg).
Average wind speed in September
Roanoke, LA
- Average wind speed in September: 6.1mph
The windiest month (with the highest average wind speed) is February (9.2mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in September
Roanoke, LA
- Average humidity in September: 78%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Roanoke, LA
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is August (2.44").
The driest month (with the least rainfall) is February (1.02").
Average rainfall days in September
Roanoke, LA
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is August (18.3 days).
The month with the least rainy days is November (7.7 days).
Average snowfall in September
Roanoke, LA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.04").
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
Roanoke, LA
- Average snowfall days in September: 0.1 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, October and November (0 days).
Average daylight in September /
Average sunshine in September
Roanoke, 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 5min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in September
Roanoke, LA
- Average sunshine days in September: 13 days
The month with the most sunshine days is November (21 days).
The month with the least sunshine days is August (9.7 days).
Average UV index in September
Roanoke, LA
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Roanoke, LA
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is October (Cloud cover 24).
Average visibility in September
Roanoke, 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).
Roanoke, Louisiana, USA
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