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 signifies a gentle decline in South Rosemary's average high-temperature, easing from a hot 86.7°F (30.4°C) in August to a warm 81.1°F (27.3°C). Throughout September nights, South Rosemary registers an average low-temperature of 63.5°F (17.5°C).Heat index
The average heat index in September is evaluated at a tropical 86°F (30°C). Constant activity during exposure could result in a state of weariness and possibly heat cramps.Metrics for the heat index primarily focus on shaded spots and light wind conditions. The heat index could see an increase by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
The average relative humidity in September is 77%.Rainfall
In South Rosemary, in September, during 12.5 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. In South Rosemary, during the entire year, the rain falls for 156.2 days and collects up to 27.6" (701mm) of precipitation.Snowfall
In South Rosemary, snow does not fall in April through October.Daylight
In September, the average length of the day in South Rosemary, North Carolina, is 12h and 24min.On the first day of September, sunrise is at 6:42 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:05 am and sunset at 6:55 pm EDT.
Sunshine
In South Rosemary, the average sunshine in September is 8.9h.UV index
The average daily maximum UV index in September in South Rosemary is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 5 in September transforms into the following instructions:
Guard yourself - Avoiding sunburn is suggested. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for South Rosemary in September?
What is the average humidity in September in South Rosemary?
How many days does it rain in September in South Rosemary?
When it does not snow in South Rosemary?
What is the average length of the day in September in South Rosemary?
When is the sunrise / sunset in September in South Rosemary?
How many hours of sunshine does South Rosemary have in September?
How high is the UV index in September in South Rosemary?
Average temperature in September
South Rosemary, NC
- Average high temperature in September: 81.1°F
The warmest month (with the highest average high temperature) is July (88.7°F).
The month with the lowest average high temperature is January (46.8°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (31.8°F).
Average pressure in September
South Rosemary, NC
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
South Rosemary, NC
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
South Rosemary, NC
- Average humidity in September: 77%
The month with the highest relative humidity is May (79%).
The months with the lowest relative humidity are January, April, July and November (74%).
Average rainfall in September
South Rosemary, NC
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is August (3.07").
The driest month (with the least rainfall) is October (1.85").
Average rainfall days in September
South Rosemary, NC
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in September
South Rosemary, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.3").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
South Rosemary, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
South Rosemary, 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 months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
South Rosemary, NC
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is May (11.5 days).
Average UV index in September
South Rosemary, NC
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
South Rosemary, NC
- Average cloud cover in September: 38
The month with the most cloud cover is March (Cloud cover 44).
The months with the least cloud cover are June and July (Cloud cover 31).
Average visibility in September
South Rosemary, 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 Rosemary, North Carolina, USA
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