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
September indicates a minor shift in the average high-temperature, from August's tropical 87.4°F (30.8°C) to a warm 81.7°F (27.6°C). September brings with it a nighttime average temperature of 63.1°F (17.3°C).Heat index
During September, the heat index is estimated at a tropical 87.8°F (31°C). Exhaustion might be the outcome of enduring exposure and continuous activity, with a risk of heat cramps.For clarity, heat index numbers account for light winds and areas under shade. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', combines both the air temperature and the humidity level to give a perceived human temperature. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Humidity
In September, the average relative humidity is 76%.Rainfall
September is the month with the least rainfall. Rain falls for 13.2 days and accumulates 2.09" (53mm) of precipitation.Snowfall
In South Henderson, snow does not fall in April through October.Daylight
In South Henderson, the average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:45 am and sunset at 7:41 pm. On the last day of September, in South Henderson, sunrise is at 7:08 am and sunset at 6:58 pm EDT.
Sunshine
The average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 5 during September translates into the following guidance:
Exercise care. People with light skin might get burns in fewer than 30 minutes. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
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
South Henderson, NC
- Average high temperature in September: 81.7°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 (46.8°F).
- Average low temperature in September: 63.1°F
The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (31.1°F).
Average pressure in September
South Henderson, NC
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
South Henderson, NC
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
South Henderson, NC
- Average humidity in September: 76%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (72%).
Average rainfall in September
South Henderson, NC
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is August (2.87").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in September
South Henderson, NC
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is November (9.2 days).
Average snowfall in September
South Henderson, NC
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.85").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
South Henderson, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.9 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
South Henderson, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 5min
The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
South Henderson, NC
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is November (20.1 days).
The months with the least sunshine days are May and July (12.1 days).
Average UV index in September
South Henderson, NC
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
South Henderson, NC
- Average cloud cover in September: 38
The months with the most cloud cover are February and March (Cloud cover 43).
The months with the least cloud cover are June and July (Cloud cover 31).
Average visibility in September
South Henderson, NC
- 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).
South Henderson, North Carolina, USA
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