September weather forecastKirkley Mill, SC
September
Weather in September
The first month of the autumn, September, is still a warm month in Kirkley Mill, South Carolina, with an average temperature varying between 65.5°F (18.6°C) and 82.9°F (28.3°C).Temperature
With the onset of September, Kirkley Mill experiences a modest temperature adjustment, with the average high-temperature gently receding from a tropical 88.3°F (31.3°C) in August to a moderately hot 82.9°F (28.3°C). September witnesses an average nighttime temperature of 65.5°F (18.6°C).Heat index
During September, the heat index is calculated to be a hot 89.6°F (32°C). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. An exposure to direct sunlight may lift the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
The average relative humidity in September in Kirkley Mill is 74%.Rainfall
In September, the rain falls for 12.7 days. Throughout September, 2.36" (60mm) of precipitation is accumulated. In Kirkley Mill, during the entire year, the rain falls for 161.3 days and collects up to 33.03" (839mm) of precipitation.Snowfall
April through October are months without snowfall in Kirkley Mill.Daylight
In Kirkley Mill, South Carolina, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:55 am and sunset at 7:47 pm. On the last day of September, sunrise is at 7:16 am and sunset at 7:07 pm EDT.
Sunshine
In Kirkley Mill, the average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index in Kirkley Mill, South Carolina, is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 5 during September translates into these guidelines:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Kirkley Mill, SC
- Average high temperature in September: 82.9°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 (50.7°F).
- Average low temperature in September: 65.5°F
The month with the highest average low temperature is July (72°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in September
Kirkley Mill, SC
- Average pressure in September: 30.02"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
Kirkley Mill, SC
- Average wind speed in September: 5.9mph
The windiest months (with the highest average wind speed) are February and April (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Kirkley Mill, SC
- Average humidity in September: 74%
The month with the highest relative humidity is May (75%).
The months with the lowest relative humidity are January, March, July and November (71%).
Average rainfall in September
Kirkley Mill, SC
- Average rainfall in September: 2.36"
The wettest month (with the highest rainfall) is August (3.58").
The driest month (with the least rainfall) is October (2.09").
Average rainfall days in September
Kirkley Mill, SC
- Average rainfall days in September: 12.7 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is October (8.7 days).
Average snowfall in September
Kirkley Mill, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Kirkley Mill, SC
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.8 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
Kirkley Mill, SC
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Kirkley Mill, SC
- Average sunshine days in September: 15.4 days
The month with the most sunshine days is October (21.1 days).
The month with the least sunshine days is July (10.6 days).
Average UV index in September
Kirkley Mill, SC
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Kirkley Mill, SC
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 43).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Kirkley Mill, 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).
