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
The arrival of September coincides with an average high-temperature of a moderately hot 85.8°F (29.9°C), indicating a minimal shift from August's 90.9°F (32.7°C). An average low-temperature of 67.1°F (19.5°C) is expected during September.Heat index
The average heat index in September is computed to be a fiery hot 95°F (35°C). Exercise extra preventive actions, heat cramps and heat exhaustion are plausible. Continuous activity could result in heatstroke.Understanding the heat index involves considering values for shaded locales with light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', quantifies the warmth felt when relative humidity is considered. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children frequently underestimate the importance of resting and drinking fluids. Thirst is a symptom of advanced dehydration - hence the need to hydrate regularly, especially during protracted physical exercises.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. Augmented relative humidity impedes typical body cooling mechanisms by lowering the evaporation rate, resulting in decreased body cooling and an amplified perception of heat. If heat absorption exceeds the body's cooling ability, body temperature can elevate, resulting in potential thermal illnesses.
Humidity
In Clarks Hill, the average relative humidity in September is 70%.Rainfall
September is the month with the least rainfall in Clarks Hill. Rain falls for 8.5 days and accumulates 0.43" (11mm) of precipitation.Snowfall
February through December are months without snowfall in Clarks Hill.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 7:03 am and sunset at 7:53 pm. On the last day of September, in Clarks Hill, sunrise is at 7:22 am and sunset at 7:14 pm EDT.
Sunshine
In September, the average sunshine in Clarks Hill, South Carolina, is 8.6h.UV index
The average daily maximum UV index in September in Clarks Hill is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: An average UV index of 6 in September transforms into this advice:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Clarks Hill?
What is the average humidity in September in Clarks Hill?
What is the driest month in Clarks Hill?
How much does it rain in Clarks Hill in September?
When it does not snow in Clarks Hill?
How many hours of daylight does Clarks Hill have in September?
When are sunrise and sunset in September in Clarks Hill?
How long on average sun shines in September in Clarks Hill?
What is the UV index intensity in September in Clarks Hill?
Average temperature in September
Clarks Hill, SC
- Average high temperature in September: 85.8°F
The warmest month (with the highest average high temperature) is July (92.3°F).
The month with the lowest average high temperature is January (53.6°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).
Average pressure in September
Clarks Hill, 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 (29.98"Hg).
Average wind speed in September
Clarks Hill, SC
- Average wind speed in September: 5.8mph
The windiest months (with the highest average wind speed) are February, March and April (8mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Clarks Hill, SC
- Average humidity in September: 70%
The month with the highest relative humidity is December (75%).
The month with the lowest relative humidity is July (69%).
Average rainfall in September
Clarks Hill, SC
- Average rainfall in September: 0.43"
The wettest month (with the highest rainfall) is August (1.26").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days in September
Clarks Hill, SC
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is August (13.8 days).
The month with the least rainy days is October (5.5 days).
Average snowfall in September
Clarks Hill, SC
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.08").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Clarks Hill, 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
Clarks Hill, SC
- 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: 10h and 0min).
- Average sunshine in September: 8h and 4min
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
Clarks Hill, SC
- Average sunshine days in September: 19.1 days
The month with the most sunshine days is October (24.2 days).
The month with the least sunshine days is August (13.3 days).
Average UV index in September
Clarks Hill, 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, February and December (UV index 3).
Average cloud cover in September
Clarks Hill, SC
- Average cloud cover in September: 30
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is October (Cloud cover 27).
Average visibility in September
Clarks Hill, 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).
Clarks Hill, South Carolina, USA
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