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 sea temperature 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 arrival of September sees an average high-temperature of a still moderately hot 81.3°F (27.4°C), hardly diverging from August's 85.1°F (29.5°C). An average low-temperature of 71.6°F (22°C) is noted during the month of September.Heat index
September's mean heat index is evaluated at a hot 86°F (30°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.Be advised, the heat index considers values for conditions in shade and with a light breeze. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Humidity
In Emerald Isle, the average relative humidity in September is 77%.Rainfall
In Emerald Isle, North Carolina, in September, during 15 rainfall days, 3.03" (77mm) of precipitation is typically accumulated. In Emerald Isle, during the entire year, the rain falls for 156.1 days and collects up to 21.61" (549mm) of precipitation.Snowfall
April through December are months without snowfall.Ocean temperature
In Emerald Isle, in September, the average water temperature is 80.8°F (27.1°C).Note: For swimming, diving, and various water activities, the temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are seen as highly enjoyable and comfortable for extended durations without any discomfort.
Daylight
In Emerald Isle, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:33 pm. On the last day of September, sunrise is at 7:02 am and sunset at 6:52 pm EDT.
Sunshine
In Emerald Isle, the average sunshine in September is 9.5h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.Note: In September, the UV index of 6 transforms into the following advice:
Refrain from overexposure. Fair-skinned individuals could burn in under 20 minutes. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Take warning! Reflective sand and water surfaces intensify the Sun's UV rays.
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?
How many days does it rain in September?
When it does not snow?
What is the ocean temperature in September?
How many hours of daylight does Emerald Isle have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Emerald Isle, NC
- Average high temperature in September: 81.3°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (53.1°F).
- Average low temperature in September: 71.6°F
The month with the highest average low temperature is July (76.6°F).
The coldest month (with the lowest average low temperature) is January (41.2°F).
Average pressure in September
Emerald Isle, NC
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January, November and December (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Emerald Isle, NC
- Average wind speed in September: 9.6mph
The windiest months (with the highest average wind speed) are February, March and April (11.1mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).
Average humidity in September
Emerald Isle, NC
- Average humidity in September: 77%
The month with the highest relative humidity is August (78%).
The months with the lowest relative humidity are January, February, March and April (74%).
Average rainfall in September
Emerald Isle, NC
- Average rainfall in September: 3.03"
The wettest month (with the highest rainfall) is August (3.43").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Emerald Isle, NC
- Average rainfall days in September: 15 days
The month with the highest number of rainy days is August (20.1 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in September
Emerald Isle, NC
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.2").
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Emerald Isle, NC
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January, February and December (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Emerald Isle, NC
- Average sea temperature in September: 80.9°F
The best month for swimming (with the highest average sea temperature) is August (83.2°F).
The coldest month (with the lowest average sea temperature) is February (61.3°F).
Average daylight in September /
Average sunshine in September
Emerald Isle, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).
Average sunshine days in September
Emerald Isle, NC
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is January (19.4 days).
The month with the least sunshine days is August (8.4 days).
Average UV index in September
Emerald Isle, NC
- Average UV index in September: 6
The months with the highest UV index are 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
Emerald Isle, NC
- Average cloud cover in September: 32
The months with the most cloud cover are February, March and December (Cloud cover 40).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in September
Emerald Isle, 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).
Emerald Isle, North Carolina, USA
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