September weather forecastAwendaw, SC
September
Weather in September
September ushers in the end of summer with slightly cooler temperatures compared to August, and a noticeable decrease in daylight hours. The amount of daily sunshine sees a significant reduction, while breeze gusts become stronger. There is also a decrease in rainfall, highlighting the transitioning weather. The temperatures seesaw between 69.8°F (21°C) at night and 84.2°F (29°C) by day.Temperature
Transitioning into September, Awendaw records an average high-temperature of a warm 84.2°F (29°C), almost identical to August's 88.7°F (31.5°C). An average minimum temperature of 69.8°F (21°C) is recorded during the month of September.Heat index
The heat index in September is estimated at a hot 93.2°F (34°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.Keep in mind the heat index values are meant for areas in shade and with light wind. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an estimation of the warmth sensation when considering humidity levels. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Youngsters are usually more at risk than adults, considering they sweat less. Additionally, their high skin surface area compared to their little bodies and their high heat production due to activity increases their risk.
Humidity
In Awendaw, the average relative humidity in September is 77%.Rainfall
In Awendaw, during September, the rain falls for 17.5 days and regularly aggregates up to 4.13" (105mm) of precipitation. In Awendaw, during the entire year, the rain falls for 179.5 days and collects up to 40.79" (1036mm) of precipitation.Snowfall
March through November are months without snowfall in Awendaw.Daylight
The average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:53 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 7:03 pm EDT.
Sunshine
In Awendaw, South Carolina, the average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Prevent overexposure. Protection from the sun's harmful effects is needed. Avoid direct exposure to the Sun between 10 a.m. and 4 p.m., the peak period for UV radiation, noting that objects like parasols or canopies might not offer complete sun protection. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Awendaw, SC
- Average high temperature in September: 84.2°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 (55.8°F).
- Average low temperature in September: 69.8°F
The month with the highest average low temperature is July (74.8°F).
The coldest month (with the lowest average low temperature) is January (40.8°F).
Average pressure in September
Awendaw, SC
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Awendaw, SC
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Awendaw, SC
- Average humidity in September: 77%
The months with the highest relative humidity are August and December (78%).
The months with the lowest relative humidity are January and March (74%).
Average rainfall in September
Awendaw, SC
- Average rainfall in September: 4.13"
The wettest month (with the highest rainfall) is August (6.46").
The driest month (with the least rainfall) is January (1.46").
Average rainfall days in September
Awendaw, SC
- Average rainfall days in September: 17.5 days
The months with the highest number of rainy days are July and August (23.2 days).
The month with the least rainy days is November (8.9 days).
Average snowfall in September
Awendaw, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Awendaw, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.5 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Awendaw, SC
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Awendaw, SC
- Average sunshine days in September: 10 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (5.5 days).
Average UV index in September
Awendaw, SC
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Awendaw, SC
- Average cloud cover in September: 29
The months with the most cloud cover are February and December (Cloud cover 40).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in September
Awendaw, SC
- 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).
