September weather forecastTimmonsville, SC
September
Weather in September
September, the first month of the autumn in Timmonsville, is also a moderately hot month, with temperature in the range of an average high of 83.7°F (28.7°C) and an average low of 66.6°F (19.2°C).Temperature
In September, Timmonsville notes an average high-temperature of a warm 83.7°F (28.7°C), hardly different from the preceding month. During the month of September, the nighttime temperature in Timmonsville, South Carolina, falls to an average of 66.6°F (19.2°C).Heat index
In September, the heat index is calculated to be a hot 91.4°F (33°C). Adopt heightened safety measures, heat cramps and heat exhaustion may occur. Sustained activity might cause heatstroke.Take note of the fact that heat index values are based on shaded circumstances with light airflows. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. The perception of temperature can be subjective, varying based on activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
May, August and September, with an average relative humidity of 77%, are the most humid months.Rainfall
In Timmonsville, in September, during 9.2 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, in Timmonsville, there are 123.1 rainfall days, and 13.19" (335mm) of precipitation is accumulated.Snowfall
In Timmonsville, snow does not fall in March through November.Daylight
The average length of the day in September is 12h and 22min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:45 pm. On the last day of September, in Timmonsville, South Carolina, sunrise is at 7:14 am and sunset at 7:04 pm EDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from unsafe exposure to UV radiation for the average person.Note: During September, 6 as the daily maximum UV index converts into the following advice:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. The Sun emits the most powerful UV radiation between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Timmonsville, SC
- Average high temperature in September: 83.7°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (52.3°F).
- Average low temperature in September: 66.6°F
The month with the highest average low temperature is July (72.7°F).
The coldest month (with the lowest average low temperature) is January (37.4°F).
Average pressure in September
Timmonsville, SC
- Average pressure in September: 30.01"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Timmonsville, SC
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).
Average humidity in September
Timmonsville, SC
- Average humidity in September: 77%
The months with the highest relative humidity are May, August and September (77%).
The months with the lowest relative humidity are January and November (72%).
Average rainfall in September
Timmonsville, SC
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is August (1.57").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Timmonsville, SC
- Average rainfall days in September: 9.2 days
The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (5.7 days).
Average snowfall in September
Timmonsville, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.16").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Timmonsville, 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
Timmonsville, 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: 9h and 6min
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
Timmonsville, SC
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is November (23.3 days).
The month with the least sunshine days is July (12.7 days).
Average UV index in September
Timmonsville, SC
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 2).
Average cloud cover in September
Timmonsville, SC
- Average cloud cover in September: 33
The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and October (Cloud cover 29).
Average visibility in September
Timmonsville, 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).
