September weather forecast and climate
Piedmont, SC

September, the first month of the autumn, in Piedmont, is still a warm month, with temperature in the range of an average high of 82.4°F (28°C) and an average low of 61.9°F (16.6°C).

Temperature

In September, the average high-temperature marginally drops, from a hot 87.8°F (31°C) in August, to a moderately hot 82.4°F (28°C). In September, in Piedmont, the average low-temperature is 61.9°F (16.6°C).

Heat index

The average heat index is appraised at a tropical 87.6°F (30.9°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. With the 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 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. 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 especially crucial for babies and toddlers. 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

In September, the average relative humidity is 72%.

Rainfall

September is the month with the least rainfall in Piedmont. Rain falls for 11.9 days and accumulates 1.38" (35mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

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

Sunshine

The average sunshine in Piedmont is 8.7h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Piedmont?

In September, in Piedmont, the average high-temperature is 82.4°F (28°C), and the average low-temperature is 61.9°F (16.6°C). In September, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that represents influence of the relative humidity to air temperaure, is calculated to 87.6°F (30.9°C).

What is the average humidity in September in Piedmont?

In Piedmont, South Carolina, the average relative humidity in September is 72%.

How many days does it rain in September in Piedmont?

In Piedmont, South Carolina, in September, it is raining for 11.9 days, with typically 1.38" (35mm) of accumulated precipitation.

What is the driest month in Piedmont?

The month with the least rainfall in Piedmont is September when the rain falls for 11.9 days and typically collects 1.38" (35mm) of precipitation.

When it does not snow in Piedmont?

In Piedmont snow does not fall in April through October.

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

In September, the average length of the day in Piedmont, South Carolina, is 12.4h.

How many hours of sunshine does Piedmont have in September?

In Piedmont, the average sunshine in September is 8.7h.

What is the UV index reading in September in Piedmont?

In September, the average daily maximum UV index in Piedmont is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - Piedmont, SC
  • Average high temperature in September: 82.4°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (49.3°F).

  • Average low temperature in September: 61.9°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).

Average pressure in September - Piedmont, SC
  • Average pressure in September: 30.04"

The month with the highest atmospheric pressure is November (30.15").
The month with the lowest atmospheric pressure is June (29.99").

Average wind speed in September - Piedmont, SC
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).

Average humidity in September - Piedmont, SC
  • Average humidity in September: 72%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is July (69%).

Average rainfall in September - Piedmont, SC
  • Average rainfall in September: 1.38"

The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.38").

Average rainfall days in September - Piedmont, SC
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is November (7.8 days).

Average snowfall in September - Piedmont, SC
  • Average snowfall in September: 0"

The month with the highest snowfall is December (2.01").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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

Months with the highest number of snowfall days are January and February (1 days).
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 - Piedmont, 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: 9.9h).

  • Average sunshine in September: 8.7h

The month with the most sunshine is July (Average sunshine: 11.1h).
The month with the least sunshine is December (Average sunshine: 5.5h).

Average sunshine days in September - Piedmont, SC
  • Average sunshine days in September: 16 days

The month with the most sunshine days is October (21.9 days).
The month with the least sunshine days is July (11.5 days).

Average UV index in September - Piedmont, 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).

Average cloud cover in September - Piedmont, SC
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility in September - Piedmont, SC
  • Average visibility in September: 6mi

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).