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
Entering September, the average high-temperature is recorded at a moderately hot 83.3°F (28.5°C), exhibiting a minimal shift from August's 88°F (31.1°C). Hartsville's average low-temperature during September nights is observed to be a refreshing 66.2°F (19°C).Heat index
During September, the heat index is estimated at a tropical 91.4°F (33°C). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.Take note of the fact that heat index values are based on shaded circumstances with light airflows. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'apparent temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. This effect tends to be personal, with the weather perception differing among individuals due to variations in body mass, height, and exertion. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humidity
May and September, with an average relative humidity of 76%, are the most humid months in Hartsville.Rainfall
In September, the rain falls for 13.1 days. Throughout September, 2.64" (67mm) of precipitation is accumulated. Throughout the year, there are 154 rainfall days, and 30.51" (775mm) of precipitation is accumulated.Snowfall
April through October are months without snowfall in Hartsville.Daylight
The average length of the day in September in Hartsville, South Carolina, is 12h and 23min.On the first day of the month, sunrise is at 6:54 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:14 am and sunset at 7:05 pm EDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
In Hartsville, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 6 in September converts into the following recommendations:
Sustain precautions and conform to sun safety norms. Preventing sunburn is necessary. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Frequently asked questions
How hot is it in Hartsville in September?
What are the most humid months in Hartsville?
What is the average humidity in September in Hartsville?
How much does it rain in Hartsville in September?
When it does not snow in Hartsville?
How many hours of daylight does Hartsville have in September?
When is the sunrise / sunset in September in Hartsville?
How long on average sun shines in September in Hartsville?
What is the UV index intensity in September in Hartsville?
Average temperature in September
Hartsville, SC
- Average high temperature in September: 83.3°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (51.8°F).
- Average low temperature in September: 66.2°F
The month with the highest average low temperature is July (72.5°F).
The coldest month (with the lowest average low temperature) is January (36.9°F).
Average pressure in September
Hartsville, 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
Hartsville, SC
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Hartsville, SC
- Average humidity in September: 76%
The months with the highest relative humidity are May and September (76%).
The months with the lowest relative humidity are January and November (71%).
Average rainfall in September
Hartsville, SC
- Average rainfall in September: 2.64"
The wettest month (with the highest rainfall) is May (3.19").
The driest month (with the least rainfall) is January (1.81").
Average rainfall days in September
Hartsville, SC
- Average rainfall days in September: 13.1 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is October (7.8 days).
Average snowfall in September
Hartsville, SC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Hartsville, SC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.7 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
Hartsville, 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: 9h and 54min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Hartsville, SC
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is October (21.9 days).
The month with the least sunshine days is July (11 days).
Average UV index in September
Hartsville, 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
Hartsville, SC
- Average cloud cover in September: 32
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
Hartsville, 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).
Hartsville, South Carolina, USA
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