September weather forecastAiken, SC
September
Weather in September
September marks the beginning of autumn in Aiken, with temperatures starting to fall slightly. The days shorten, and the amount of sunshine also drops. The onset of fall brings a change in the color scheme around the city, adding a unique charm to Aiken. The temperatures span from a low of 67.1°F (19.5°C) to a high of 84.6°F (29.2°C). Despite the changing weather, September experiences the least rainfall of only 1.5" (38mm) in the month.Temperature
The onset of September marks an average high-temperature of a warm 84.6°F (29.2°C), hardly differing from August's 89.6°F (32°C). Aiken, during September nights, observes an average temperature of 67.1°F (19.5°C).Heat index
For most parts of September, the heat index is computed to be a tropical 93.2°F (34°C). Extra safeguards are necessary to prevent heat exhaustion and heat cramps. Prolonged activity might cause heatstroke.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'apparent temperature' or 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humidity
In Aiken, the average relative humidity in September is 72%.Rainfall
September is the month with the least rainfall. Rain falls for 12.1 days and accumulates 1.5" (38mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September, sunrise is at 7:01 am and sunset at 7:51 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:12 pm EDT.
Sunshine
In Aiken, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Avoid exposure to the Sun and try to stay in the shade between 10 a.m. and 4 p.m., when UV radiation is most potent, but be aware that parasols or canopies may not offer full protection. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Aiken, SC
- Average high temperature in September: 84.6°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (53.2°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (73.6°F).
The coldest month (with the lowest average low temperature) is January (37.9°F).
Average pressure in September
Aiken, SC
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January, November and December (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Aiken, SC
- Average wind speed in September: 6.2mph
The windiest months (with the highest average wind speed) are February and April (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Aiken, SC
- Average humidity in September: 72%
The month with the highest relative humidity is December (75%).
The months with the lowest relative humidity are July and November (70%).
Average rainfall in September
Aiken, SC
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is December (3.15").
The driest month (with the least rainfall) is September (1.5").
Average rainfall days in September
Aiken, SC
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (17.4 days).
The months with the least rainy days are October and November (7.7 days).
Average snowfall in September
Aiken, SC
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.28").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Aiken, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.4 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
Aiken, 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: 8h and 36min
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
Aiken, SC
- Average sunshine days in September: 16 days
The month with the most sunshine days is October (22 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
Aiken, SC
- 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
Aiken, SC
- Average cloud cover in September: 30
The months with the most cloud cover are February and December (Cloud cover 41).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
Aiken, 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).
