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
With the onset of September, the average high-temperature subtly recedes from August's hot 87.4°F (30.8°C) to a warm 82°F (27.8°C). The low-temperature averages to a comfortable 65.3°F (18.5°C) during the nights of September.Heat index
In September, the heat index is computed to be a tropical 89.6°F (32°C). Persistently participating in activities during exposure may lead to fatigue and induce heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
August, September and December, with an average relative humidity of 80%, are the most humid months.Rainfall
In Grimesland, North Carolina, in September, it is raining for 14.6 days, with typically 3.31" (84mm) of accumulated precipitation. In Grimesland, during the entire year, the rain falls for 169 days and collects up to 36.1" (917mm) of precipitation.Snowfall
In Grimesland, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:41 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 6:53 pm EDT.
Sunshine
In Grimesland, the average sunshine in September is 9h.UV index
In Grimesland, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily high UV index of 5 in September leads to these guidelines:
Be vigilant - A duty to shield skin and eyes from injury exists. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the most humid month?
What is the average humidity in September in Grimesland?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
When are sunrise and sunset in September?
How many hours of sunshine does Grimesland have in September?
What is the UV index reading in September?
Average temperature in September
Grimesland, NC
- Average high temperature in September: 82°F
The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (49.6°F).
- Average low temperature in September: 65.3°F
The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).
Average pressure in September
Grimesland, NC
- Average pressure in September: 30.02"Hg
The months with the highest atmospheric pressure are November and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Grimesland, NC
- Average wind speed in September: 6.1mph
The windiest month (with the highest average wind speed) is April (7.9mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Grimesland, NC
- Average humidity in September: 80%
The months with the highest relative humidity are August, September and December (80%).
The months with the lowest relative humidity are January and April (76%).
Average rainfall in September
Grimesland, NC
- Average rainfall in September: 3.31"
The wettest month (with the highest rainfall) is August (4.17").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in September
Grimesland, NC
- Average rainfall days in September: 14.6 days
The month with the highest number of rainy days is July (20.3 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in September
Grimesland, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.1").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Grimesland, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.6 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
Grimesland, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 0min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Grimesland, NC
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is October (19.4 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in September
Grimesland, NC
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Grimesland, NC
- Average cloud cover in September: 40
The month with the most cloud cover is March (Cloud cover 44).
The months with the least cloud cover are June and October (Cloud cover 35).
Average visibility in September
Grimesland, NC
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, June, October, November and December (6mi).
The months with the lowest visibility are May, July, August and September (5mi).
Grimesland, North Carolina, USA
Weather forecast for your location
2. Allow the app to use your location