September weather forecast
White Stone, SC

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Weather in September

September, the first month of the autumn in White Stone, is still a warm month, with an average temperature fluctuating between 83.8°F (28.8°C) and 63.5°F (17.5°C).

Temperature

September brings a slight decrease in the average high-temperature, shifting from a tropical 89.4°F (31.9°C) in August to a warm 83.8°F (28.8°C). White Stone's average low-temperature in the month of September is recorded at an enjoyable 63.5°F (17.5°C).

Heat index

For September, the heat index is appraised at a hot 91.4°F (33°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.
Keep in mind the heat index values are meant for areas in shade and with light wind. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', binds temperature metrics with humidity values to give a sense of the actual warmth. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.

Humidity

In White Stone, the average relative humidity in September is 72%.

Rainfall

The month with the least rainfall is September, when the rain falls for 11.5 days and typically collects 1.54" (39mm) of precipitation.

Snowfall

April through November are months without snowfall.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of September in White Stone, sunrise is at 7:00 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 7:21 am and sunset at 7:12 pm EDT.

Sunshine

The average sunshine in September is 8.5h.

UV index

In White Stone, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days.
Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot is it in September?

In White Stone, 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. 'apparent temperature', 'felt air temperature'), which factors the actual air temperature with the relative humidity, in September is appraised at 91.4°F (33°C).

What is the average humidity in September?

In September, the average relative humidity is 72%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 1.54" (39mm) of precipitation.

How much does it rain in September?

In September, the rain falls for 11.5 days. Throughout September, 1.54" (39mm) of precipitation is accumulated.

When it does not snow?

April through November are months without snowfall.

How many hours of daylight does White Stone have in September?

In White Stone, the average day length in September is 12h and 23min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 7:00 am and sunset at 7:53 pm. On the last day of the month, in White Stone, sunrise is at 7:21 am and sunset at 7:12 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.5h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
White Stone, SC

Average temperature in September - White Stone, SC
  • Average high temperature in September: 83.8°F

The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is January (49.6°F).

  • Average low temperature in September: 63.5°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).

Average pressure in September
White Stone, SC

Average pressure in September - White Stone, SC
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in September
White Stone, SC

Average wind speed in September - White Stone, SC
  • Average wind speed in September: 4.9mph

The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).

Average humidity in September
White Stone, SC

Average humidity in September - White Stone, SC
  • Average humidity in September: 72%

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

Average rainfall in September
White Stone, SC

Average rainfall in September - White Stone, SC
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.54").

Average rainfall days in September
White Stone, SC

Average rainfall days in September - White Stone, SC
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is July (16.4 days).
The month with the least rainy days is November (8.5 days).

Average snowfall in September
White Stone, SC

Average snowfall in September - White Stone, SC
  • Average snowfall in September: 0"

The month with the highest snowfall is December (1.97").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in September
White Stone, SC

Average snowfall days in September - White Stone, SC
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (1.6 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
White Stone, SC

Average daylight in September / Average sunshine in September - White Stone, SC
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).

  • Average sunshine in September: 8h and 3min

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 18min).

Average sunshine days in September
White Stone, SC

Average sunshine days in September - White Stone, SC
  • Average sunshine days in September: 16.8 days

The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is July (11.9 days).

Average UV index in September
White Stone, SC

Average UV index in September - White Stone, SC
  • Average UV index in September: 5

The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).

Average cloud cover in September
White Stone, SC

Average cloud cover in September - White Stone, SC
  • Average cloud cover in September: 32

The months with the most cloud cover are February and December (Cloud cover 42).
The months with the least cloud cover are June and July (Cloud cover 29).

Average visibility in September
White Stone, SC

Average visibility in September - White Stone, 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).

White Stone, South Carolina, USA

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