September weather forecastMount Pleasant, NC
September
Weather in September
The first month of the autumn, September, is still a warm month in Mount Pleasant, North Carolina, with an average temperature ranging between max 82.2°F (27.9°C) and min 63.5°F (17.5°C).Temperature
With the onset of September, Mount Pleasant's average high-temperature slightly adjusts, moderately receding from August's tropical 87.8°F (31°C) to a warm 82.2°F (27.9°C). September brings with it a nighttime average temperature of 63.5°F (17.5°C).Heat index
Throughout September, the heat index is computed to be a tropical 87.8°F (31°C). If one stays active during extended exposure, it might induce fatigue and result in heat cramps.Realize that the values for the heat index are set for shaded places and light winds. 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 an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children typically face more danger than adults as their sweat production is usually lower. Additionally, the bigger skin surface compared to their small size and the increased heat due to their activeness exacerbate the risk.
Humidity
In September, the average relative humidity is 74%.Rainfall
In Mount Pleasant, during September, the rain falls for 12.8 days and regularly aggregates up to 2.24" (57mm) of precipitation. In Mount Pleasant, during the entire year, the rain falls for 160.4 days and collects up to 30.75" (781mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:54 am and sunset at 7:48 pm. On the last day of September, sunrise is at 7:16 am and sunset at 7:06 pm EDT.
Sunshine
In September, the average sunshine is 9h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: An average maximum UV index of 5 in September leads to these recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mount Pleasant, NC
- Average high temperature in September: 82.2°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (48.4°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 (33.1°F).
Average pressure in September
Mount Pleasant, 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 (29.97"Hg).
Average wind speed in September
Mount Pleasant, NC
- Average wind speed in September: 5.3mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Mount Pleasant, NC
- Average humidity in September: 74%
The months with the highest relative humidity are May and December (76%).
The months with the lowest relative humidity are June and July (71%).
Average rainfall in September
Mount Pleasant, NC
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is October (1.97").
Average rainfall days in September
Mount Pleasant, NC
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is July (17.9 days).
The months with the least rainy days are October and November (9.5 days).
Average snowfall in September
Mount Pleasant, NC
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.57").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Mount Pleasant, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 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
Mount Pleasant, NC
- Average daylight in September: 12h and 24min
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 month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Mount Pleasant, NC
- Average sunshine days in September: 15 days
The month with the most sunshine days is October (20.5 days).
The month with the least sunshine days is July (11.6 days).
Average UV index in September
Mount Pleasant, 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
Mount Pleasant, NC
- Average cloud cover in September: 33
The months with the most cloud cover are February and March (Cloud cover 42).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Mount Pleasant, 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).
