September weather forecast
Spartanburg, SC

Panorama of downtown Spartanburg in South Carolina
Panorama of downtown Spartanburg in South Carolina

Weather in September

September, the first month of the autumn, in Spartanburg, is still a warm month, with average temperature ranging between min 63.5°F (17.5°C) and max 83.8°F (28.8°C).

Temperature

In September, the average high-temperature marginally drops, from a tropical 89.4°F (31.9°C) in August, to a warm 83.8°F (28.8°C). In Spartanburg, the average low-temperature is 63.5°F (17.5°C).

Heat index

The average heat index is estimated at a hot 90.5°F (32.5°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Additional factors like pregnancy, clothing, wind, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in Spartanburg is 71%.

Rainfall

The month with the least rainfall in Spartanburg is September when the rain falls for 11.6 days and typically collects 1.54" (39mm) of precipitation.

Snowfall

April through November are months without snowfall in Spartanburg.

Daylight

The average length of the day in Spartanburg is 12.4h.

Sunshine

The average sunshine in September is 8.4h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Spartanburg?

In Spartanburg, South Carolina, in September, the average high-temperature is 83.8°F (28.8°C), and the average low-temperature is 63.5°F (17.5°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in September is estimated at 90.5°F (32.5°C).

What is the average humidity in September in Spartanburg?

The average relative humidity in September in Spartanburg is 71%.

What is the driest month in Spartanburg?

The month with the least rainfall is September when the rain falls for 11.6 days and typically collects 1.54" (39mm) of precipitation.

How much does it rain in Spartanburg in September?

In Spartanburg, South Carolina, in September, it is raining for 11.6 days, with typically 1.54" (39mm) of accumulated precipitation.

When it does not snow in Spartanburg?

April through November are months without snowfall in Spartanburg.

What is the average length of the day in September in Spartanburg?

In Spartanburg, the average length of the day in September is 12.4h.

How many hours of sunshine does Spartanburg have in September?

In September, the average sunshine in Spartanburg, South Carolina, is 8.4h.

What is the UV index reading in September in Spartanburg?

In September, the average daily maximum UV index in Spartanburg, South Carolina, is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
Spartanburg, SC

Average temperature in September - Spartanburg, SC
  • Average high temperature in September: 28.8°C

The warmest month (with the highest average high temperature) is July (33°C).
The month with the lowest average high temperature is January (9.8°C).

  • Average low temperature in September: 17.5°C

The month with the highest average low temperature is July (20.8°C).
The coldest month (with the lowest average low temperature) is January (0.6°C).

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Average pressure in September
Spartanburg, SC

Average pressure in September - Spartanburg, SC
  • Average pressure in September: 1017.2mbar

The month with the highest atmospheric pressure is November (1021.1mbar).
The month with the lowest atmospheric pressure is June (1015.4mbar).

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Average wind speed in September
Spartanburg, SC

Average wind speed in September - Spartanburg, SC
  • Average wind speed in September: 8km/h

The windiest month (with the highest average wind speed) is April (11.3km/h).
The calmest month (with the lowest average wind speed) is August (7.1km/h).

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Average humidity in September
Spartanburg, SC

Average humidity in September - Spartanburg, SC
  • Average humidity in September: 71%

The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (68%).

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Average rainfall in September
Spartanburg, SC

Average rainfall in September - Spartanburg, SC
  • Average rainfall in September: 39mm

The wettest month (with the highest rainfall) is December (87mm).
The driest month (with the least rainfall) is September (39mm).

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Average rainfall days in September
Spartanburg, SC

Average rainfall days in September - Spartanburg, SC
  • Average rainfall days in September: 11.6 days

Months with the highest number of rainy days are July and August (15.8 days).
The month with the least rainy days is November (8.5 days).

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Average snowfall in September
Spartanburg, SC

Average snowfall in September - Spartanburg, SC
  • Average snowfall in September: 0mm

The month with the highest snowfall is December (56mm).
Months with the least snowfall are April, May, June, July, August, September, October and November (0mm).

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Average snowfall days in September
Spartanburg, SC

Average snowfall days in September - Spartanburg, SC
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.3 days).
Months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).

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Average daylight in September /
Average sunshine in September
Spartanburg, SC

Average daylight in September / Average sunshine in September - Spartanburg, SC
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.5h).
The month with the shortest days is December (Average daylight: 9.8h).

  • Average sunshine in September: 8.4h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is December (Average sunshine: 5.3h).

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Average sunshine days in September
Spartanburg, SC

Average sunshine days in September - Spartanburg, SC
  • Average sunshine days in September: 16.6 days

The month with the most sunshine days is October (22 days).
The month with the least sunshine days is July (12.7 days).

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Average UV index in September
Spartanburg, SC

Average UV index in September - Spartanburg, SC
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in September
Spartanburg, SC

Average cloud cover in September - Spartanburg, SC
  • Average cloud cover in September: 33

Months with the most cloud cover are February and December (Cloud cover 43).
Months with the least cloud cover are June and July (Cloud cover 29).

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Average visibility in September
Spartanburg, SC

Average visibility in September - Spartanburg, SC
  • Average visibility in September: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).

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