September weather forecastClifton, SC
September
Weather in September
September, the first month of the autumn in Clifton, is also a moderately hot month, with an average temperature varying between 63.5°F (17.5°C) and 83.8°F (28.8°C).Temperature
As August makes way for September, Clifton's average high-temperature eases from a tropical 89.4°F (31.9°C) to a warm 83.8°F (28.8°C). September nights in Clifton are marked by an average low-temperature of 63.5°F (17.5°C).Heat index
During September, the heat index is appraised at a tropical 91.4°F (33°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.It is emphasized that the heat index's values are meant for shaded zones with mild winds. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', quantifies the warmth felt when relative humidity is considered. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. One's exposure to direct sunlight has the potential to intensify the heat sensation, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. 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.
Humidity
The average relative humidity in September in Clifton is 72%.Rainfall
September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 1.54" (39mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
In September, the average length of the day in Clifton is 12h and 23min.On the first day of the month, sunrise is at 7:00 am and sunset at 7:53 pm. On the last day of September, in Clifton, sunrise is at 7:21 am and sunset at 7:12 pm EDT.
Sunshine
In September, the average sunshine in Clifton is 8.5h.UV index
In Clifton, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Ensure safety - Sun damage prevention is strongly urged. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Clifton, SC
- Average high temperature in September: 83.8°F
The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is January (49.6°F).
- Average low temperature in September: 63.5°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).
Average pressure in September
Clifton, SC
- 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 (29.98"Hg).
Average wind speed in September
Clifton, SC
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Clifton, SC
- Average humidity in September: 72%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (68%).
Average rainfall in September
Clifton, SC
- Average rainfall in September: 1.54"
The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in September
Clifton, SC
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in September
Clifton, SC
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.97").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Clifton, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.6 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
Clifton, SC
- 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 54min).
- Average sunshine in September: 8h and 30min
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 18min).
Average sunshine days in September
Clifton, SC
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is July (11.9 days).
Average UV index in September
Clifton, SC
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Clifton, SC
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 42).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility in September
Clifton, 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).
